drivers/s390/net/qeth_core_main.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *    Copyright IBM Corp. 2007, 2009
   4  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
   5  *               Frank Pavlic <fpavlic@de.ibm.com>,
   6  *               Thomas Spatzier <tspat@de.ibm.com>,
   7  *               Frank Blaschka <frank.blaschka@de.ibm.com>
   8  */
   9
  10 #define KMSG_COMPONENT "qeth"
  11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  12
  13 #include <linux/compat.h>
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/string.h>
  17 #include <linux/errno.h>
  18 #include <linux/kernel.h>
  19 #include <linux/log2.h>
  20 #include <linux/io.h>
  21 #include <linux/ip.h>
  22 #include <linux/tcp.h>
  23 #include <linux/mii.h>
  24 #include <linux/mm.h>
  25 #include <linux/kthread.h>
  26 #include <linux/slab.h>
  27 #include <linux/if_vlan.h>
  28 #include <linux/netdevice.h>
  29 #include <linux/netdev_features.h>
  30 #include <linux/rcutree.h>
  31 #include <linux/skbuff.h>
  32 #include <linux/vmalloc.h>
  33
  34 #include <net/iucv/af_iucv.h>
  35 #include <net/dsfield.h>
  36 #include <net/sock.h>
  37
  38 #include <asm/ebcdic.h>
  39 #include <asm/chpid.h>
  40 #include <asm/sysinfo.h>
  41 #include <asm/diag.h>
  42 #include <asm/cio.h>
  43 #include <asm/ccwdev.h>
  44 #include <asm/cpcmd.h>
  45
  46 #include "qeth_core.h"
  47
  48 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
  49         /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
  50         /*                   N  P  A    M  L  V                      H  */
  51         [QETH_DBF_SETUP] = {"qeth_setup",
  52                                 8, 1,   8, 5, &debug_hex_ascii_view, NULL},
  53         [QETH_DBF_MSG]   = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
  54                             &debug_sprintf_view, NULL},
  55         [QETH_DBF_CTRL]  = {"qeth_control",
  56                 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
  57 };
  58 EXPORT_SYMBOL_GPL(qeth_dbf);
  59
  60 struct kmem_cache *qeth_core_header_cache;
  61 EXPORT_SYMBOL_GPL(qeth_core_header_cache);
  62 static struct kmem_cache *qeth_qdio_outbuf_cache;
  63
  64 static struct device *qeth_core_root_dev;
  65 static struct dentry *qeth_debugfs_root;
  66 static struct lock_class_key qdio_out_skb_queue_key;
  67
  68 static void qeth_issue_next_read_cb(struct qeth_card *card,
  69                                     struct qeth_cmd_buffer *iob,
  70                                     unsigned int data_length);
  71 static int qeth_qdio_establish(struct qeth_card *);
  72 static void qeth_free_qdio_queues(struct qeth_card *card);
  73 static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
  74                 struct qeth_qdio_out_buffer *buf,
  75                 enum iucv_tx_notify notification);
  76 static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
  77                                  int budget);
  78 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *, int);
  79
  80 static void qeth_close_dev_handler(struct work_struct *work)
  81 {
  82         struct qeth_card *card;
  83
  84         card = container_of(work, struct qeth_card, close_dev_work);
  85         QETH_CARD_TEXT(card, 2, "cldevhdl");
  86         ccwgroup_set_offline(card->gdev);
  87 }
  88
  89 static const char *qeth_get_cardname(struct qeth_card *card)
  90 {
  91         if (IS_VM_NIC(card)) {
  92                 switch (card->info.type) {
  93                 case QETH_CARD_TYPE_OSD:
  94                         return " Virtual NIC QDIO";
  95                 case QETH_CARD_TYPE_IQD:
  96                         return " Virtual NIC Hiper";
  97                 case QETH_CARD_TYPE_OSM:
  98                         return " Virtual NIC QDIO - OSM";
  99                 case QETH_CARD_TYPE_OSX:
 100                         return " Virtual NIC QDIO - OSX";
 101                 default:
 102                         return " unknown";
 103                 }
 104         } else {
 105                 switch (card->info.type) {
 106                 case QETH_CARD_TYPE_OSD:
 107                         return " OSD Express";
 108                 case QETH_CARD_TYPE_IQD:
 109                         return " HiperSockets";
 110                 case QETH_CARD_TYPE_OSN:
 111                         return " OSN QDIO";
 112                 case QETH_CARD_TYPE_OSM:
 113                         return " OSM QDIO";
 114                 case QETH_CARD_TYPE_OSX:
 115                         return " OSX QDIO";
 116                 default:
 117                         return " unknown";
 118                 }
 119         }
 120         return " n/a";
 121 }
 122
 123 /* max length to be returned: 14 */
 124 const char *qeth_get_cardname_short(struct qeth_card *card)
 125 {
 126         if (IS_VM_NIC(card)) {
 127                 switch (card->info.type) {
 128                 case QETH_CARD_TYPE_OSD:
 129                         return "Virt.NIC QDIO";
 130                 case QETH_CARD_TYPE_IQD:
 131                         return "Virt.NIC Hiper";
 132                 case QETH_CARD_TYPE_OSM:
 133                         return "Virt.NIC OSM";
 134                 case QETH_CARD_TYPE_OSX:
 135                         return "Virt.NIC OSX";
 136                 default:
 137                         return "unknown";
 138                 }
 139         } else {
 140                 switch (card->info.type) {
 141                 case QETH_CARD_TYPE_OSD:
 142                         switch (card->info.link_type) {
 143                         case QETH_LINK_TYPE_FAST_ETH:
 144                                 return "OSD_100";
 145                         case QETH_LINK_TYPE_HSTR:
 146                                 return "HSTR";
 147                         case QETH_LINK_TYPE_GBIT_ETH:
 148                                 return "OSD_1000";
 149                         case QETH_LINK_TYPE_10GBIT_ETH:
 150                                 return "OSD_10GIG";
 151                         case QETH_LINK_TYPE_25GBIT_ETH:
 152                                 return "OSD_25GIG";
 153                         case QETH_LINK_TYPE_LANE_ETH100:
 154                                 return "OSD_FE_LANE";
 155                         case QETH_LINK_TYPE_LANE_TR:
 156                                 return "OSD_TR_LANE";
 157                         case QETH_LINK_TYPE_LANE_ETH1000:
 158                                 return "OSD_GbE_LANE";
 159                         case QETH_LINK_TYPE_LANE:
 160                                 return "OSD_ATM_LANE";
 161                         default:
 162                                 return "OSD_Express";
 163                         }
 164                 case QETH_CARD_TYPE_IQD:
 165                         return "HiperSockets";
 166                 case QETH_CARD_TYPE_OSN:
 167                         return "OSN";
 168                 case QETH_CARD_TYPE_OSM:
 169                         return "OSM_1000";
 170                 case QETH_CARD_TYPE_OSX:
 171                         return "OSX_10GIG";
 172                 default:
 173                         return "unknown";
 174                 }
 175         }
 176         return "n/a";
 177 }
 178
 179 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
 180                          int clear_start_mask)
 181 {
 182         unsigned long flags;
 183
 184         spin_lock_irqsave(&card->thread_mask_lock, flags);
 185         card->thread_allowed_mask = threads;
 186         if (clear_start_mask)
 187                 card->thread_start_mask &= threads;
 188         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 189         wake_up(&card->wait_q);
 190 }
 191 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
 192
 193 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
 194 {
 195         unsigned long flags;
 196         int rc = 0;
 197
 198         spin_lock_irqsave(&card->thread_mask_lock, flags);
 199         rc = (card->thread_running_mask & threads);
 200         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 201         return rc;
 202 }
 203 EXPORT_SYMBOL_GPL(qeth_threads_running);
 204
 205 static void qeth_clear_working_pool_list(struct qeth_card *card)
 206 {
 207         struct qeth_buffer_pool_entry *pool_entry, *tmp;
 208         struct qeth_qdio_q *queue = card->qdio.in_q;
 209         unsigned int i;
 210
 211         QETH_CARD_TEXT(card, 5, "clwrklst");
 212         list_for_each_entry_safe(pool_entry, tmp,
 213                                  &card->qdio.in_buf_pool.entry_list, list)
 214                 list_del(&pool_entry->list);
 215
 216         for (i = 0; i < ARRAY_SIZE(queue->bufs); i++)
 217                 queue->bufs[i].pool_entry = NULL;
 218 }
 219
 220 static void qeth_free_pool_entry(struct qeth_buffer_pool_entry *entry)
 221 {
 222         unsigned int i;
 223
 224         for (i = 0; i < ARRAY_SIZE(entry->elements); i++) {
 225                 if (entry->elements[i])
 226                         __free_page(entry->elements[i]);
 227         }
 228
 229         kfree(entry);
 230 }
 231
 232 static void qeth_free_buffer_pool(struct qeth_card *card)
 233 {
 234         struct qeth_buffer_pool_entry *entry, *tmp;
 235
 236         list_for_each_entry_safe(entry, tmp, &card->qdio.init_pool.entry_list,
 237                                  init_list) {
 238                 list_del(&entry->init_list);
 239                 qeth_free_pool_entry(entry);
 240         }
 241 }
 242
 243 static struct qeth_buffer_pool_entry *qeth_alloc_pool_entry(unsigned int pages)
 244 {
 245         struct qeth_buffer_pool_entry *entry;
 246         unsigned int i;
 247
 248         entry = kzalloc(sizeof(*entry), GFP_KERNEL);
 249         if (!entry)
 250                 return NULL;
 251
 252         for (i = 0; i < pages; i++) {
 253                 entry->elements[i] = __dev_alloc_page(GFP_KERNEL);
 254
 255                 if (!entry->elements[i]) {
 256                         qeth_free_pool_entry(entry);
 257                         return NULL;
 258                 }
 259         }
 260
 261         return entry;
 262 }
 263
 264 static int qeth_alloc_buffer_pool(struct qeth_card *card)
 265 {
 266         unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
 267         unsigned int i;
 268
 269         QETH_CARD_TEXT(card, 5, "alocpool");
 270         for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
 271                 struct qeth_buffer_pool_entry *entry;
 272
 273                 entry = qeth_alloc_pool_entry(buf_elements);
 274                 if (!entry) {
 275                         qeth_free_buffer_pool(card);
 276                         return -ENOMEM;
 277                 }
 278
 279                 list_add(&entry->init_list, &card->qdio.init_pool.entry_list);
 280         }
 281         return 0;
 282 }
 283
 284 int qeth_resize_buffer_pool(struct qeth_card *card, unsigned int count)
 285 {
 286         unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
 287         struct qeth_qdio_buffer_pool *pool = &card->qdio.init_pool;
 288         struct qeth_buffer_pool_entry *entry, *tmp;
 289         int delta = count - pool->buf_count;
 290         LIST_HEAD(entries);
 291
 292         QETH_CARD_TEXT(card, 2, "realcbp");
 293
 294         /* Defer until queue is allocated: */
 295         if (!card->qdio.in_q)
 296                 goto out;
 297
 298         /* Remove entries from the pool: */
 299         while (delta < 0) {
 300                 entry = list_first_entry(&pool->entry_list,
 301                                          struct qeth_buffer_pool_entry,
 302                                          init_list);
 303                 list_del(&entry->init_list);
 304                 qeth_free_pool_entry(entry);
 305
 306                 delta++;
 307         }
 308
 309         /* Allocate additional entries: */
 310         while (delta > 0) {
 311                 entry = qeth_alloc_pool_entry(buf_elements);
 312                 if (!entry) {
 313                         list_for_each_entry_safe(entry, tmp, &entries,
 314                                                  init_list) {
 315                                 list_del(&entry->init_list);
 316                                 qeth_free_pool_entry(entry);
 317                         }
 318
 319                         return -ENOMEM;
 320                 }
 321
 322                 list_add(&entry->init_list, &entries);
 323
 324                 delta--;
 325         }
 326
 327         list_splice(&entries, &pool->entry_list);
 328
 329 out:
 330         card->qdio.in_buf_pool.buf_count = count;
 331         pool->buf_count = count;
 332         return 0;
 333 }
 334 EXPORT_SYMBOL_GPL(qeth_resize_buffer_pool);
 335
 336 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
 337 {
 338         if (!q)
 339                 return;
 340
 341         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
 342         kfree(q);
 343 }
 344
 345 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
 346 {
 347         struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
 348         int i;
 349
 350         if (!q)
 351                 return NULL;
 352
 353         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
 354                 kfree(q);
 355                 return NULL;
 356         }
 357
 358         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
 359                 q->bufs[i].buffer = q->qdio_bufs[i];
 360
 361         QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
 362         return q;
 363 }
 364
 365 static int qeth_cq_init(struct qeth_card *card)
 366 {
 367         int rc;
 368
 369         if (card->options.cq == QETH_CQ_ENABLED) {
 370                 QETH_CARD_TEXT(card, 2, "cqinit");
 371                 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
 372                                    QDIO_MAX_BUFFERS_PER_Q);
 373                 card->qdio.c_q->next_buf_to_init = 127;
 374                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT,
 375                              card->qdio.no_in_queues - 1, 0,
 376                              127);
 377                 if (rc) {
 378                         QETH_CARD_TEXT_(card, 2, "1err%d", rc);
 379                         goto out;
 380                 }
 381         }
 382         rc = 0;
 383 out:
 384         return rc;
 385 }
 386
 387 static int qeth_alloc_cq(struct qeth_card *card)
 388 {
 389         int rc;
 390
 391         if (card->options.cq == QETH_CQ_ENABLED) {
 392                 int i;
 393                 struct qdio_outbuf_state *outbuf_states;
 394
 395                 QETH_CARD_TEXT(card, 2, "cqon");
 396                 card->qdio.c_q = qeth_alloc_qdio_queue();
 397                 if (!card->qdio.c_q) {
 398                         rc = -1;
 399                         goto kmsg_out;
 400                 }
 401                 card->qdio.no_in_queues = 2;
 402                 card->qdio.out_bufstates =
 403                         kcalloc(card->qdio.no_out_queues *
 404                                         QDIO_MAX_BUFFERS_PER_Q,
 405                                 sizeof(struct qdio_outbuf_state),
 406                                 GFP_KERNEL);
 407                 outbuf_states = card->qdio.out_bufstates;
 408                 if (outbuf_states == NULL) {
 409                         rc = -1;
 410                         goto free_cq_out;
 411                 }
 412                 for (i = 0; i < card->qdio.no_out_queues; ++i) {
 413                         card->qdio.out_qs[i]->bufstates = outbuf_states;
 414                         outbuf_states += QDIO_MAX_BUFFERS_PER_Q;
 415                 }
 416         } else {
 417                 QETH_CARD_TEXT(card, 2, "nocq");
 418                 card->qdio.c_q = NULL;
 419                 card->qdio.no_in_queues = 1;
 420         }
 421         QETH_CARD_TEXT_(card, 2, "iqc%d", card->qdio.no_in_queues);
 422         rc = 0;
 423 out:
 424         return rc;
 425 free_cq_out:
 426         qeth_free_qdio_queue(card->qdio.c_q);
 427         card->qdio.c_q = NULL;
 428 kmsg_out:
 429         dev_err(&card->gdev->dev, "Failed to create completion queue\n");
 430         goto out;
 431 }
 432
 433 static void qeth_free_cq(struct qeth_card *card)
 434 {
 435         if (card->qdio.c_q) {
 436                 --card->qdio.no_in_queues;
 437                 qeth_free_qdio_queue(card->qdio.c_q);
 438                 card->qdio.c_q = NULL;
 439         }
 440         kfree(card->qdio.out_bufstates);
 441         card->qdio.out_bufstates = NULL;
 442 }
 443
 444 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
 445                                                         int delayed)
 446 {
 447         enum iucv_tx_notify n;
 448
 449         switch (sbalf15) {
 450         case 0:
 451                 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
 452                 break;
 453         case 4:
 454         case 16:
 455         case 17:
 456         case 18:
 457                 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
 458                         TX_NOTIFY_UNREACHABLE;
 459                 break;
 460         default:
 461                 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
 462                         TX_NOTIFY_GENERALERROR;
 463                 break;
 464         }
 465
 466         return n;
 467 }
 468
 469 static void qeth_cleanup_handled_pending(struct qeth_qdio_out_q *q, int bidx,
 470                                          int forced_cleanup)
 471 {
 472         if (q->card->options.cq != QETH_CQ_ENABLED)
 473                 return;
 474
 475         if (q->bufs[bidx]->next_pending != NULL) {
 476                 struct qeth_qdio_out_buffer *head = q->bufs[bidx];
 477                 struct qeth_qdio_out_buffer *c = q->bufs[bidx]->next_pending;
 478
 479                 while (c) {
 480                         if (forced_cleanup ||
 481                             atomic_read(&c->state) ==
 482                               QETH_QDIO_BUF_HANDLED_DELAYED) {
 483                                 struct qeth_qdio_out_buffer *f = c;
 484
 485                                 QETH_CARD_TEXT(f->q->card, 5, "fp");
 486                                 QETH_CARD_TEXT_(f->q->card, 5, "%lx", (long) f);
 487                                 /* release here to avoid interleaving between
 488                                    outbound tasklet and inbound tasklet
 489                                    regarding notifications and lifecycle */
 490                                 qeth_tx_complete_buf(c, forced_cleanup, 0);
 491
 492                                 c = f->next_pending;
 493                                 WARN_ON_ONCE(head->next_pending != f);
 494                                 head->next_pending = c;
 495                                 kmem_cache_free(qeth_qdio_outbuf_cache, f);
 496                         } else {
 497                                 head = c;
 498                                 c = c->next_pending;
 499                         }
 500
 501                 }
 502         }
 503 }
 504
 505 static void qeth_qdio_handle_aob(struct qeth_card *card,
 506                                  unsigned long phys_aob_addr)
 507 {
 508         enum qeth_qdio_out_buffer_state new_state = QETH_QDIO_BUF_QAOB_OK;
 509         struct qaob *aob;
 510         struct qeth_qdio_out_buffer *buffer;
 511         enum iucv_tx_notify notification;
 512         unsigned int i;
 513
 514         aob = (struct qaob *) phys_to_virt(phys_aob_addr);
 515         QETH_CARD_TEXT(card, 5, "haob");
 516         QETH_CARD_TEXT_(card, 5, "%lx", phys_aob_addr);
 517         buffer = (struct qeth_qdio_out_buffer *) aob->user1;
 518         QETH_CARD_TEXT_(card, 5, "%lx", aob->user1);
 519
 520         /* Free dangling allocations. The attached skbs are handled by
 521          * qeth_cleanup_handled_pending().
 522          */
 523         for (i = 0;
 524              i < aob->sb_count && i < QETH_MAX_BUFFER_ELEMENTS(card);
 525              i++) {
 526                 void *data = phys_to_virt(aob->sba[i]);
 527
 528                 if (data && buffer->is_header[i])
 529                         kmem_cache_free(qeth_core_header_cache, data);
 530         }
 531
 532         if (aob->aorc) {
 533                 QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
 534                 new_state = QETH_QDIO_BUF_QAOB_ERROR;
 535         }
 536
 537         switch (atomic_xchg(&buffer->state, new_state)) {
 538         case QETH_QDIO_BUF_PRIMED:
 539                 /* Faster than TX completion code. */
 540                 notification = qeth_compute_cq_notification(aob->aorc, 0);
 541                 qeth_notify_skbs(buffer->q, buffer, notification);
 542                 atomic_set(&buffer->state, QETH_QDIO_BUF_HANDLED_DELAYED);
 543                 break;
 544         case QETH_QDIO_BUF_PENDING:
 545                 /* TX completion code is active and will handle the async
 546                  * completion for us.
 547                  */
 548                 break;
 549         case QETH_QDIO_BUF_NEED_QAOB:
 550                 /* TX completion code is already finished. */
 551                 notification = qeth_compute_cq_notification(aob->aorc, 1);
 552                 qeth_notify_skbs(buffer->q, buffer, notification);
 553                 atomic_set(&buffer->state, QETH_QDIO_BUF_HANDLED_DELAYED);
 554                 break;
 555         default:
 556                 WARN_ON_ONCE(1);
 557         }
 558
 559         qdio_release_aob(aob);
 560 }
 561
 562 static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len,
 563                            void *data)
 564 {
 565         ccw->cmd_code = cmd_code;
 566         ccw->flags = flags | CCW_FLAG_SLI;
 567         ccw->count = len;
 568         ccw->cda = (__u32) __pa(data);
 569 }
 570
 571 static int __qeth_issue_next_read(struct qeth_card *card)
 572 {
 573         struct qeth_cmd_buffer *iob = card->read_cmd;
 574         struct qeth_channel *channel = iob->channel;
 575         struct ccw1 *ccw = __ccw_from_cmd(iob);
 576         int rc;
 577
 578         QETH_CARD_TEXT(card, 5, "issnxrd");
 579         if (channel->state != CH_STATE_UP)
 580                 return -EIO;
 581
 582         memset(iob->data, 0, iob->length);
 583         qeth_setup_ccw(ccw, CCW_CMD_READ, 0, iob->length, iob->data);
 584         iob->callback = qeth_issue_next_read_cb;
 585         /* keep the cmd alive after completion: */
 586         qeth_get_cmd(iob);
 587
 588         QETH_CARD_TEXT(card, 6, "noirqpnd");
 589         rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0);
 590         if (!rc) {
 591                 channel->active_cmd = iob;
 592         } else {
 593                 QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
 594                                  rc, CARD_DEVID(card));
 595                 qeth_unlock_channel(card, channel);
 596                 qeth_put_cmd(iob);
 597                 card->read_or_write_problem = 1;
 598                 qeth_schedule_recovery(card);
 599         }
 600         return rc;
 601 }
 602
 603 static int qeth_issue_next_read(struct qeth_card *card)
 604 {
 605         int ret;
 606
 607         spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 608         ret = __qeth_issue_next_read(card);
 609         spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 610
 611         return ret;
 612 }
 613
 614 static void qeth_enqueue_cmd(struct qeth_card *card,
 615                              struct qeth_cmd_buffer *iob)
 616 {
 617         spin_lock_irq(&card->lock);
 618         list_add_tail(&iob->list, &card->cmd_waiter_list);
 619         spin_unlock_irq(&card->lock);
 620 }
 621
 622 static void qeth_dequeue_cmd(struct qeth_card *card,
 623                              struct qeth_cmd_buffer *iob)
 624 {
 625         spin_lock_irq(&card->lock);
 626         list_del(&iob->list);
 627         spin_unlock_irq(&card->lock);
 628 }
 629
 630 void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason)
 631 {
 632         iob->rc = reason;
 633         complete(&iob->done);
 634 }
 635 EXPORT_SYMBOL_GPL(qeth_notify_cmd);
 636
 637 static void qeth_flush_local_addrs4(struct qeth_card *card)
 638 {
 639         struct qeth_local_addr *addr;
 640         struct hlist_node *tmp;
 641         unsigned int i;
 642
 643         spin_lock_irq(&card->local_addrs4_lock);
 644         hash_for_each_safe(card->local_addrs4, i, tmp, addr, hnode) {
 645                 hash_del_rcu(&addr->hnode);
 646                 kfree_rcu(addr, rcu);
 647         }
 648         spin_unlock_irq(&card->local_addrs4_lock);
 649 }
 650
 651 static void qeth_flush_local_addrs6(struct qeth_card *card)
 652 {
 653         struct qeth_local_addr *addr;
 654         struct hlist_node *tmp;
 655         unsigned int i;
 656
 657         spin_lock_irq(&card->local_addrs6_lock);
 658         hash_for_each_safe(card->local_addrs6, i, tmp, addr, hnode) {
 659                 hash_del_rcu(&addr->hnode);
 660                 kfree_rcu(addr, rcu);
 661         }
 662         spin_unlock_irq(&card->local_addrs6_lock);
 663 }
 664
 665 static void qeth_flush_local_addrs(struct qeth_card *card)
 666 {
 667         qeth_flush_local_addrs4(card);
 668         qeth_flush_local_addrs6(card);
 669 }
 670
 671 static void qeth_add_local_addrs4(struct qeth_card *card,
 672                                   struct qeth_ipacmd_local_addrs4 *cmd)
 673 {
 674         unsigned int i;
 675
 676         if (cmd->addr_length !=
 677             sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
 678                 dev_err_ratelimited(&card->gdev->dev,
 679                                     "Dropped IPv4 ADD LOCAL ADDR event with bad length %u\n",
 680                                     cmd->addr_length);
 681                 return;
 682         }
 683
 684         spin_lock(&card->local_addrs4_lock);
 685         for (i = 0; i < cmd->count; i++) {
 686                 unsigned int key = ipv4_addr_hash(cmd->addrs[i].addr);
 687                 struct qeth_local_addr *addr;
 688                 bool duplicate = false;
 689
 690                 hash_for_each_possible(card->local_addrs4, addr, hnode, key) {
 691                         if (addr->addr.s6_addr32[3] == cmd->addrs[i].addr) {
 692                                 duplicate = true;
 693                                 break;
 694                         }
 695                 }
 696
 697                 if (duplicate)
 698                         continue;
 699
 700                 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
 701                 if (!addr) {
 702                         dev_err(&card->gdev->dev,
 703                                 "Failed to allocate local addr object. Traffic to %pI4 might suffer.\n",
 704                                 &cmd->addrs[i].addr);
 705                         continue;
 706                 }
 707
 708                 ipv6_addr_set(&addr->addr, 0, 0, 0, cmd->addrs[i].addr);
 709                 hash_add_rcu(card->local_addrs4, &addr->hnode, key);
 710         }
 711         spin_unlock(&card->local_addrs4_lock);
 712 }
 713
 714 static void qeth_add_local_addrs6(struct qeth_card *card,
 715                                   struct qeth_ipacmd_local_addrs6 *cmd)
 716 {
 717         unsigned int i;
 718
 719         if (cmd->addr_length !=
 720             sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
 721                 dev_err_ratelimited(&card->gdev->dev,
 722                                     "Dropped IPv6 ADD LOCAL ADDR event with bad length %u\n",
 723                                     cmd->addr_length);
 724                 return;
 725         }
 726
 727         spin_lock(&card->local_addrs6_lock);
 728         for (i = 0; i < cmd->count; i++) {
 729                 u32 key = ipv6_addr_hash(&cmd->addrs[i].addr);
 730                 struct qeth_local_addr *addr;
 731                 bool duplicate = false;
 732
 733                 hash_for_each_possible(card->local_addrs6, addr, hnode, key) {
 734                         if (ipv6_addr_equal(&addr->addr, &cmd->addrs[i].addr)) {
 735                                 duplicate = true;
 736                                 break;
 737                         }
 738                 }
 739
 740                 if (duplicate)
 741                         continue;
 742
 743                 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
 744                 if (!addr) {
 745                         dev_err(&card->gdev->dev,
 746                                 "Failed to allocate local addr object. Traffic to %pI6c might suffer.\n",
 747                                 &cmd->addrs[i].addr);
 748                         continue;
 749                 }
 750
 751                 addr->addr = cmd->addrs[i].addr;
 752                 hash_add_rcu(card->local_addrs6, &addr->hnode, key);
 753         }
 754         spin_unlock(&card->local_addrs6_lock);
 755 }
 756
 757 static void qeth_del_local_addrs4(struct qeth_card *card,
 758                                   struct qeth_ipacmd_local_addrs4 *cmd)
 759 {
 760         unsigned int i;
 761
 762         if (cmd->addr_length !=
 763             sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
 764                 dev_err_ratelimited(&card->gdev->dev,
 765                                     "Dropped IPv4 DEL LOCAL ADDR event with bad length %u\n",
 766                                     cmd->addr_length);
 767                 return;
 768         }
 769
 770         spin_lock(&card->local_addrs4_lock);
 771         for (i = 0; i < cmd->count; i++) {
 772                 struct qeth_ipacmd_local_addr4 *addr = &cmd->addrs[i];
 773                 unsigned int key = ipv4_addr_hash(addr->addr);
 774                 struct qeth_local_addr *tmp;
 775
 776                 hash_for_each_possible(card->local_addrs4, tmp, hnode, key) {
 777                         if (tmp->addr.s6_addr32[3] == addr->addr) {
 778                                 hash_del_rcu(&tmp->hnode);
 779                                 kfree_rcu(tmp, rcu);
 780                                 break;
 781                         }
 782                 }
 783         }
 784         spin_unlock(&card->local_addrs4_lock);
 785 }
 786
 787 static void qeth_del_local_addrs6(struct qeth_card *card,
 788                                   struct qeth_ipacmd_local_addrs6 *cmd)
 789 {
 790         unsigned int i;
 791
 792         if (cmd->addr_length !=
 793             sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
 794                 dev_err_ratelimited(&card->gdev->dev,
 795                                     "Dropped IPv6 DEL LOCAL ADDR event with bad length %u\n",
 796                                     cmd->addr_length);
 797                 return;
 798         }
 799
 800         spin_lock(&card->local_addrs6_lock);
 801         for (i = 0; i < cmd->count; i++) {
 802                 struct qeth_ipacmd_local_addr6 *addr = &cmd->addrs[i];
 803                 u32 key = ipv6_addr_hash(&addr->addr);
 804                 struct qeth_local_addr *tmp;
 805
 806                 hash_for_each_possible(card->local_addrs6, tmp, hnode, key) {
 807                         if (ipv6_addr_equal(&tmp->addr, &addr->addr)) {
 808                                 hash_del_rcu(&tmp->hnode);
 809                                 kfree_rcu(tmp, rcu);
 810                                 break;
 811                         }
 812                 }
 813         }
 814         spin_unlock(&card->local_addrs6_lock);
 815 }
 816
 817 static bool qeth_next_hop_is_local_v4(struct qeth_card *card,
 818                                       struct sk_buff *skb)
 819 {
 820         struct qeth_local_addr *tmp;
 821         bool is_local = false;
 822         unsigned int key;
 823         __be32 next_hop;
 824
 825         if (hash_empty(card->local_addrs4))
 826                 return false;
 827
 828         rcu_read_lock();
 829         next_hop = qeth_next_hop_v4_rcu(skb, qeth_dst_check_rcu(skb, 4));
 830         key = ipv4_addr_hash(next_hop);
 831
 832         hash_for_each_possible_rcu(card->local_addrs4, tmp, hnode, key) {
 833                 if (tmp->addr.s6_addr32[3] == next_hop) {
 834                         is_local = true;
 835                         break;
 836                 }
 837         }
 838         rcu_read_unlock();
 839
 840         return is_local;
 841 }
 842
 843 static bool qeth_next_hop_is_local_v6(struct qeth_card *card,
 844                                       struct sk_buff *skb)
 845 {
 846         struct qeth_local_addr *tmp;
 847         struct in6_addr *next_hop;
 848         bool is_local = false;
 849         u32 key;
 850
 851         if (hash_empty(card->local_addrs6))
 852                 return false;
 853
 854         rcu_read_lock();
 855         next_hop = qeth_next_hop_v6_rcu(skb, qeth_dst_check_rcu(skb, 6));
 856         key = ipv6_addr_hash(next_hop);
 857
 858         hash_for_each_possible_rcu(card->local_addrs6, tmp, hnode, key) {
 859                 if (ipv6_addr_equal(&tmp->addr, next_hop)) {
 860                         is_local = true;
 861                         break;
 862                 }
 863         }
 864         rcu_read_unlock();
 865
 866         return is_local;
 867 }
 868
 869 static int qeth_debugfs_local_addr_show(struct seq_file *m, void *v)
 870 {
 871         struct qeth_card *card = m->private;
 872         struct qeth_local_addr *tmp;
 873         unsigned int i;
 874
 875         rcu_read_lock();
 876         hash_for_each_rcu(card->local_addrs4, i, tmp, hnode)
 877                 seq_printf(m, "%pI4\n", &tmp->addr.s6_addr32[3]);
 878         hash_for_each_rcu(card->local_addrs6, i, tmp, hnode)
 879                 seq_printf(m, "%pI6c\n", &tmp->addr);
 880         rcu_read_unlock();
 881
 882         return 0;
 883 }
 884
 885 DEFINE_SHOW_ATTRIBUTE(qeth_debugfs_local_addr);
 886
 887 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
 888                 struct qeth_card *card)
 889 {
 890         const char *ipa_name;
 891         int com = cmd->hdr.command;
 892
 893         ipa_name = qeth_get_ipa_cmd_name(com);
 894
 895         if (rc)
 896                 QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n",
 897                                  ipa_name, com, CARD_DEVID(card), rc,
 898                                  qeth_get_ipa_msg(rc));
 899         else
 900                 QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
 901                                  ipa_name, com, CARD_DEVID(card));
 902 }
 903
 904 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
 905                                                 struct qeth_ipa_cmd *cmd)
 906 {
 907         QETH_CARD_TEXT(card, 5, "chkipad");
 908
 909         if (IS_IPA_REPLY(cmd)) {
 910                 if (cmd->hdr.command != IPA_CMD_SETCCID &&
 911                     cmd->hdr.command != IPA_CMD_DELCCID &&
 912                     cmd->hdr.command != IPA_CMD_MODCCID &&
 913                     cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
 914                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 915                 return cmd;
 916         }
 917
 918         /* handle unsolicited event: */
 919         switch (cmd->hdr.command) {
 920         case IPA_CMD_STOPLAN:
 921                 if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
 922                         dev_err(&card->gdev->dev,
 923                                 "Interface %s is down because the adjacent port is no longer in reflective relay mode\n",
 924                                 netdev_name(card->dev));
 925                         schedule_work(&card->close_dev_work);
 926                 } else {
 927                         dev_warn(&card->gdev->dev,
 928                                  "The link for interface %s on CHPID 0x%X failed\n",
 929                                  netdev_name(card->dev), card->info.chpid);
 930                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 931                         netif_carrier_off(card->dev);
 932                 }
 933                 return NULL;
 934         case IPA_CMD_STARTLAN:
 935                 dev_info(&card->gdev->dev,
 936                          "The link for %s on CHPID 0x%X has been restored\n",
 937                          netdev_name(card->dev), card->info.chpid);
 938                 if (card->info.hwtrap)
 939                         card->info.hwtrap = 2;
 940                 qeth_schedule_recovery(card);
 941                 return NULL;
 942         case IPA_CMD_SETBRIDGEPORT_IQD:
 943         case IPA_CMD_SETBRIDGEPORT_OSA:
 944         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 945                 if (card->discipline->control_event_handler(card, cmd))
 946                         return cmd;
 947                 return NULL;
 948         case IPA_CMD_MODCCID:
 949                 return cmd;
 950         case IPA_CMD_REGISTER_LOCAL_ADDR:
 951                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
 952                         qeth_add_local_addrs4(card, &cmd->data.local_addrs4);
 953                 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
 954                         qeth_add_local_addrs6(card, &cmd->data.local_addrs6);
 955
 956                 QETH_CARD_TEXT(card, 3, "irla");
 957                 return NULL;
 958         case IPA_CMD_UNREGISTER_LOCAL_ADDR:
 959                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
 960                         qeth_del_local_addrs4(card, &cmd->data.local_addrs4);
 961                 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
 962                         qeth_del_local_addrs6(card, &cmd->data.local_addrs6);
 963
 964                 QETH_CARD_TEXT(card, 3, "urla");
 965                 return NULL;
 966         default:
 967                 QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
 968                 return cmd;
 969         }
 970 }
 971
 972 static void qeth_clear_ipacmd_list(struct qeth_card *card)
 973 {
 974         struct qeth_cmd_buffer *iob;
 975         unsigned long flags;
 976
 977         QETH_CARD_TEXT(card, 4, "clipalst");
 978
 979         spin_lock_irqsave(&card->lock, flags);
 980         list_for_each_entry(iob, &card->cmd_waiter_list, list)
 981                 qeth_notify_cmd(iob, -ECANCELED);
 982         spin_unlock_irqrestore(&card->lock, flags);
 983 }
 984
 985 static int qeth_check_idx_response(struct qeth_card *card,
 986         unsigned char *buffer)
 987 {
 988         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
 989         if ((buffer[2] & QETH_IDX_TERMINATE_MASK) == QETH_IDX_TERMINATE) {
 990                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
 991                                  buffer[4]);
 992                 QETH_CARD_TEXT(card, 2, "ckidxres");
 993                 QETH_CARD_TEXT(card, 2, " idxterm");
 994                 QETH_CARD_TEXT_(card, 2, "rc%x", buffer[4]);
 995                 if (buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT ||
 996                     buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT_VM) {
 997                         dev_err(&card->gdev->dev,
 998                                 "The device does not support the configured transport mode\n");
 999                         return -EPROTONOSUPPORT;
1000                 }
1001                 return -EIO;
1002         }
1003         return 0;
1004 }
1005
1006 void qeth_put_cmd(struct qeth_cmd_buffer *iob)
1007 {
1008         if (refcount_dec_and_test(&iob->ref_count)) {
1009                 kfree(iob->data);
1010                 kfree(iob);
1011         }
1012 }
1013 EXPORT_SYMBOL_GPL(qeth_put_cmd);
1014
1015 static void qeth_release_buffer_cb(struct qeth_card *card,
1016                                    struct qeth_cmd_buffer *iob,
1017                                    unsigned int data_length)
1018 {
1019         qeth_put_cmd(iob);
1020 }
1021
1022 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
1023 {
1024         qeth_notify_cmd(iob, rc);
1025         qeth_put_cmd(iob);
1026 }
1027
1028 struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel,
1029                                        unsigned int length, unsigned int ccws,
1030                                        long timeout)
1031 {
1032         struct qeth_cmd_buffer *iob;
1033
1034         if (length > QETH_BUFSIZE)
1035                 return NULL;
1036
1037         iob = kzalloc(sizeof(*iob), GFP_KERNEL);
1038         if (!iob)
1039                 return NULL;
1040
1041         iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1),
1042                             GFP_KERNEL | GFP_DMA);
1043         if (!iob->data) {
1044                 kfree(iob);
1045                 return NULL;
1046         }
1047
1048         init_completion(&iob->done);
1049         spin_lock_init(&iob->lock);
1050         INIT_LIST_HEAD(&iob->list);
1051         refcount_set(&iob->ref_count, 1);
1052         iob->channel = channel;
1053         iob->timeout = timeout;
1054         iob->length = length;
1055         return iob;
1056 }
1057 EXPORT_SYMBOL_GPL(qeth_alloc_cmd);
1058
1059 static void qeth_issue_next_read_cb(struct qeth_card *card,
1060                                     struct qeth_cmd_buffer *iob,
1061                                     unsigned int data_length)
1062 {
1063         struct qeth_cmd_buffer *request = NULL;
1064         struct qeth_ipa_cmd *cmd = NULL;
1065         struct qeth_reply *reply = NULL;
1066         struct qeth_cmd_buffer *tmp;
1067         unsigned long flags;
1068         int rc = 0;
1069
1070         QETH_CARD_TEXT(card, 4, "sndctlcb");
1071         rc = qeth_check_idx_response(card, iob->data);
1072         switch (rc) {
1073         case 0:
1074                 break;
1075         case -EIO:
1076                 qeth_schedule_recovery(card);
1077                 fallthrough;
1078         default:
1079                 qeth_clear_ipacmd_list(card);
1080                 goto err_idx;
1081         }
1082
1083         cmd = __ipa_reply(iob);
1084         if (cmd) {
1085                 cmd = qeth_check_ipa_data(card, cmd);
1086                 if (!cmd)
1087                         goto out;
1088                 if (IS_OSN(card) && card->osn_info.assist_cb &&
1089                     cmd->hdr.command != IPA_CMD_STARTLAN) {
1090                         card->osn_info.assist_cb(card->dev, cmd);
1091                         goto out;
1092                 }
1093         }
1094
1095         /* match against pending cmd requests */
1096         spin_lock_irqsave(&card->lock, flags);
1097         list_for_each_entry(tmp, &card->cmd_waiter_list, list) {
1098                 if (tmp->match && tmp->match(tmp, iob)) {
1099                         request = tmp;
1100                         /* take the object outside the lock */
1101                         qeth_get_cmd(request);
1102                         break;
1103                 }
1104         }
1105         spin_unlock_irqrestore(&card->lock, flags);
1106
1107         if (!request)
1108                 goto out;
1109
1110         reply = &request->reply;
1111         if (!reply->callback) {
1112                 rc = 0;
1113                 goto no_callback;
1114         }
1115
1116         spin_lock_irqsave(&request->lock, flags);
1117         if (request->rc)
1118                 /* Bail out when the requestor has already left: */
1119                 rc = request->rc;
1120         else
1121                 rc = reply->callback(card, reply, cmd ? (unsigned long)cmd :
1122                                                         (unsigned long)iob);
1123         spin_unlock_irqrestore(&request->lock, flags);
1124
1125 no_callback:
1126         if (rc <= 0)
1127                 qeth_notify_cmd(request, rc);
1128         qeth_put_cmd(request);
1129 out:
1130         memcpy(&card->seqno.pdu_hdr_ack,
1131                 QETH_PDU_HEADER_SEQ_NO(iob->data),
1132                 QETH_SEQ_NO_LENGTH);
1133         __qeth_issue_next_read(card);
1134 err_idx:
1135         qeth_put_cmd(iob);
1136 }
1137
1138 static int qeth_set_thread_start_bit(struct qeth_card *card,
1139                 unsigned long thread)
1140 {
1141         unsigned long flags;
1142         int rc = 0;
1143
1144         spin_lock_irqsave(&card->thread_mask_lock, flags);
1145         if (!(card->thread_allowed_mask & thread))
1146                 rc = -EPERM;
1147         else if (card->thread_start_mask & thread)
1148                 rc = -EBUSY;
1149         else
1150                 card->thread_start_mask |= thread;
1151         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1152
1153         return rc;
1154 }
1155
1156 static void qeth_clear_thread_start_bit(struct qeth_card *card,
1157                                         unsigned long thread)
1158 {
1159         unsigned long flags;
1160
1161         spin_lock_irqsave(&card->thread_mask_lock, flags);
1162         card->thread_start_mask &= ~thread;
1163         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1164         wake_up(&card->wait_q);
1165 }
1166
1167 static void qeth_clear_thread_running_bit(struct qeth_card *card,
1168                                           unsigned long thread)
1169 {
1170         unsigned long flags;
1171
1172         spin_lock_irqsave(&card->thread_mask_lock, flags);
1173         card->thread_running_mask &= ~thread;
1174         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1175         wake_up_all(&card->wait_q);
1176 }
1177
1178 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1179 {
1180         unsigned long flags;
1181         int rc = 0;
1182
1183         spin_lock_irqsave(&card->thread_mask_lock, flags);
1184         if (card->thread_start_mask & thread) {
1185                 if ((card->thread_allowed_mask & thread) &&
1186                     !(card->thread_running_mask & thread)) {
1187                         rc = 1;
1188                         card->thread_start_mask &= ~thread;
1189                         card->thread_running_mask |= thread;
1190                 } else
1191                         rc = -EPERM;
1192         }
1193         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1194         return rc;
1195 }
1196
1197 static int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1198 {
1199         int rc = 0;
1200
1201         wait_event(card->wait_q,
1202                    (rc = __qeth_do_run_thread(card, thread)) >= 0);
1203         return rc;
1204 }
1205
1206 int qeth_schedule_recovery(struct qeth_card *card)
1207 {
1208         int rc;
1209
1210         QETH_CARD_TEXT(card, 2, "startrec");
1211
1212         rc = qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD);
1213         if (!rc)
1214                 schedule_work(&card->kernel_thread_starter);
1215
1216         return rc;
1217 }
1218
1219 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
1220                             struct irb *irb)
1221 {
1222         int dstat, cstat;
1223         char *sense;
1224
1225         sense = (char *) irb->ecw;
1226         cstat = irb->scsw.cmd.cstat;
1227         dstat = irb->scsw.cmd.dstat;
1228
1229         if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1230                      SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1231                      SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1232                 QETH_CARD_TEXT(card, 2, "CGENCHK");
1233                 dev_warn(&cdev->dev, "The qeth device driver "
1234                         "failed to recover an error on the device\n");
1235                 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
1236                                  CCW_DEVID(cdev), dstat, cstat);
1237                 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
1238                                 16, 1, irb, 64, 1);
1239                 return -EIO;
1240         }
1241
1242         if (dstat & DEV_STAT_UNIT_CHECK) {
1243                 if (sense[SENSE_RESETTING_EVENT_BYTE] &
1244                     SENSE_RESETTING_EVENT_FLAG) {
1245                         QETH_CARD_TEXT(card, 2, "REVIND");
1246                         return -EIO;
1247                 }
1248                 if (sense[SENSE_COMMAND_REJECT_BYTE] &
1249                     SENSE_COMMAND_REJECT_FLAG) {
1250                         QETH_CARD_TEXT(card, 2, "CMDREJi");
1251                         return -EIO;
1252                 }
1253                 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
1254                         QETH_CARD_TEXT(card, 2, "AFFE");
1255                         return -EIO;
1256                 }
1257                 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
1258                         QETH_CARD_TEXT(card, 2, "ZEROSEN");
1259                         return 0;
1260                 }
1261                 QETH_CARD_TEXT(card, 2, "DGENCHK");
1262                 return -EIO;
1263         }
1264         return 0;
1265 }
1266
1267 static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev,
1268                                 struct irb *irb)
1269 {
1270         if (!IS_ERR(irb))
1271                 return 0;
1272
1273         switch (PTR_ERR(irb)) {
1274         case -EIO:
1275                 QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
1276                                  CCW_DEVID(cdev));
1277                 QETH_CARD_TEXT(card, 2, "ckirberr");
1278                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
1279                 return -EIO;
1280         case -ETIMEDOUT:
1281                 dev_warn(&cdev->dev, "A hardware operation timed out"
1282                         " on the device\n");
1283                 QETH_CARD_TEXT(card, 2, "ckirberr");
1284                 QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
1285                 return -ETIMEDOUT;
1286         default:
1287                 QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
1288                                  PTR_ERR(irb), CCW_DEVID(cdev));
1289                 QETH_CARD_TEXT(card, 2, "ckirberr");
1290                 QETH_CARD_TEXT(card, 2, "  rc???");
1291                 return PTR_ERR(irb);
1292         }
1293 }
1294
1295 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1296                 struct irb *irb)
1297 {
1298         int rc;
1299         int cstat, dstat;
1300         struct qeth_cmd_buffer *iob = NULL;
1301         struct ccwgroup_device *gdev;
1302         struct qeth_channel *channel;
1303         struct qeth_card *card;
1304
1305         /* while we hold the ccwdev lock, this stays valid: */
1306         gdev = dev_get_drvdata(&cdev->dev);
1307         card = dev_get_drvdata(&gdev->dev);
1308
1309         QETH_CARD_TEXT(card, 5, "irq");
1310
1311         if (card->read.ccwdev == cdev) {
1312                 channel = &card->read;
1313                 QETH_CARD_TEXT(card, 5, "read");
1314         } else if (card->write.ccwdev == cdev) {
1315                 channel = &card->write;
1316                 QETH_CARD_TEXT(card, 5, "write");
1317         } else {
1318                 channel = &card->data;
1319                 QETH_CARD_TEXT(card, 5, "data");
1320         }
1321
1322         if (intparm == 0) {
1323                 QETH_CARD_TEXT(card, 5, "irqunsol");
1324         } else if ((addr_t)intparm != (addr_t)channel->active_cmd) {
1325                 QETH_CARD_TEXT(card, 5, "irqunexp");
1326
1327                 dev_err(&cdev->dev,
1328                         "Received IRQ with intparm %lx, expected %px\n",
1329                         intparm, channel->active_cmd);
1330                 if (channel->active_cmd)
1331                         qeth_cancel_cmd(channel->active_cmd, -EIO);
1332         } else {
1333                 iob = (struct qeth_cmd_buffer *) (addr_t)intparm;
1334         }
1335
1336         channel->active_cmd = NULL;
1337         qeth_unlock_channel(card, channel);
1338
1339         rc = qeth_check_irb_error(card, cdev, irb);
1340         if (rc) {
1341                 /* IO was terminated, free its resources. */
1342                 if (iob)
1343                         qeth_cancel_cmd(iob, rc);
1344                 return;
1345         }
1346
1347         if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) {
1348                 channel->state = CH_STATE_STOPPED;
1349                 wake_up(&card->wait_q);
1350         }
1351
1352         if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
1353                 channel->state = CH_STATE_HALTED;
1354                 wake_up(&card->wait_q);
1355         }
1356
1357         if (iob && (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC |
1358                                           SCSW_FCTL_HALT_FUNC))) {
1359                 qeth_cancel_cmd(iob, -ECANCELED);
1360                 iob = NULL;
1361         }
1362
1363         cstat = irb->scsw.cmd.cstat;
1364         dstat = irb->scsw.cmd.dstat;
1365
1366         if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1367             (dstat & DEV_STAT_UNIT_CHECK) ||
1368             (cstat)) {
1369                 if (irb->esw.esw0.erw.cons) {
1370                         dev_warn(&channel->ccwdev->dev,
1371                                 "The qeth device driver failed to recover "
1372                                 "an error on the device\n");
1373                         QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
1374                                          CCW_DEVID(channel->ccwdev), cstat,
1375                                          dstat);
1376                         print_hex_dump(KERN_WARNING, "qeth: irb ",
1377                                 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1378                         print_hex_dump(KERN_WARNING, "qeth: sense data ",
1379                                 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1380                 }
1381
1382                 rc = qeth_get_problem(card, cdev, irb);
1383                 if (rc) {
1384                         card->read_or_write_problem = 1;
1385                         if (iob)
1386                                 qeth_cancel_cmd(iob, rc);
1387                         qeth_clear_ipacmd_list(card);
1388                         qeth_schedule_recovery(card);
1389                         return;
1390                 }
1391         }
1392
1393         if (iob) {
1394                 /* sanity check: */
1395                 if (irb->scsw.cmd.count > iob->length) {
1396                         qeth_cancel_cmd(iob, -EIO);
1397                         return;
1398                 }
1399                 if (iob->callback)
1400                         iob->callback(card, iob,
1401                                       iob->length - irb->scsw.cmd.count);
1402         }
1403 }
1404
1405 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1406                 struct qeth_qdio_out_buffer *buf,
1407                 enum iucv_tx_notify notification)
1408 {
1409         struct sk_buff *skb;
1410
1411         skb_queue_walk(&buf->skb_list, skb) {
1412                 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1413                 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1414                 if (skb->sk && skb->sk->sk_family == PF_IUCV)
1415                         iucv_sk(skb->sk)->sk_txnotify(skb, notification);
1416         }
1417 }
1418
1419 static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
1420                                  int budget)
1421 {
1422         struct qeth_qdio_out_q *queue = buf->q;
1423         struct sk_buff *skb;
1424
1425         if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
1426                 qeth_notify_skbs(queue, buf, TX_NOTIFY_GENERALERROR);
1427
1428         /* Empty buffer? */
1429         if (buf->next_element_to_fill == 0)
1430                 return;
1431
1432         QETH_TXQ_STAT_INC(queue, bufs);
1433         QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill);
1434         if (error) {
1435                 QETH_TXQ_STAT_ADD(queue, tx_errors, buf->frames);
1436         } else {
1437                 QETH_TXQ_STAT_ADD(queue, tx_packets, buf->frames);
1438                 QETH_TXQ_STAT_ADD(queue, tx_bytes, buf->bytes);
1439         }
1440
1441         while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) {
1442                 unsigned int bytes = qdisc_pkt_len(skb);
1443                 bool is_tso = skb_is_gso(skb);
1444                 unsigned int packets;
1445
1446                 packets = is_tso ? skb_shinfo(skb)->gso_segs : 1;
1447                 if (!error) {
1448                         if (skb->ip_summed == CHECKSUM_PARTIAL)
1449                                 QETH_TXQ_STAT_ADD(queue, skbs_csum, packets);
1450                         if (skb_is_nonlinear(skb))
1451                                 QETH_TXQ_STAT_INC(queue, skbs_sg);
1452                         if (is_tso) {
1453                                 QETH_TXQ_STAT_INC(queue, skbs_tso);
1454                                 QETH_TXQ_STAT_ADD(queue, tso_bytes, bytes);
1455                         }
1456                 }
1457
1458                 napi_consume_skb(skb, budget);
1459         }
1460 }
1461
1462 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1463                                      struct qeth_qdio_out_buffer *buf,
1464                                      bool error, int budget)
1465 {
1466         int i;
1467
1468         /* is PCI flag set on buffer? */
1469         if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
1470                 atomic_dec(&queue->set_pci_flags_count);
1471
1472         qeth_tx_complete_buf(buf, error, budget);
1473
1474         for (i = 0; i < queue->max_elements; ++i) {
1475                 void *data = phys_to_virt(buf->buffer->element[i].addr);
1476
1477                 if (data && buf->is_header[i])
1478                         kmem_cache_free(qeth_core_header_cache, data);
1479                 buf->is_header[i] = 0;
1480         }
1481
1482         qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements);
1483         buf->next_element_to_fill = 0;
1484         buf->frames = 0;
1485         buf->bytes = 0;
1486         atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1487 }
1488
1489 static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free)
1490 {
1491         int j;
1492
1493         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1494                 if (!q->bufs[j])
1495                         continue;
1496                 qeth_cleanup_handled_pending(q, j, 1);
1497                 qeth_clear_output_buffer(q, q->bufs[j], true, 0);
1498                 if (free) {
1499                         kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
1500                         q->bufs[j] = NULL;
1501                 }
1502         }
1503 }
1504
1505 static void qeth_drain_output_queues(struct qeth_card *card)
1506 {
1507         int i;
1508
1509         QETH_CARD_TEXT(card, 2, "clearqdbf");
1510         /* clear outbound buffers to free skbs */
1511         for (i = 0; i < card->qdio.no_out_queues; ++i) {
1512                 if (card->qdio.out_qs[i])
1513                         qeth_drain_output_queue(card->qdio.out_qs[i], false);
1514         }
1515 }
1516
1517 static void qeth_osa_set_output_queues(struct qeth_card *card, bool single)
1518 {
1519         unsigned int max = single ? 1 : card->dev->num_tx_queues;
1520
1521         if (card->qdio.no_out_queues == max)
1522                 return;
1523
1524         if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED)
1525                 qeth_free_qdio_queues(card);
1526
1527         if (max == 1 && card->qdio.do_prio_queueing != QETH_PRIOQ_DEFAULT)
1528                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1529
1530         card->qdio.no_out_queues = max;
1531 }
1532
1533 static int qeth_update_from_chp_desc(struct qeth_card *card)
1534 {
1535         struct ccw_device *ccwdev;
1536         struct channel_path_desc_fmt0 *chp_dsc;
1537
1538         QETH_CARD_TEXT(card, 2, "chp_desc");
1539
1540         ccwdev = card->data.ccwdev;
1541         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1542         if (!chp_dsc)
1543                 return -ENOMEM;
1544
1545         card->info.func_level = 0x4100 + chp_dsc->desc;
1546
1547         if (IS_OSD(card) || IS_OSX(card))
1548                 /* CHPP field bit 6 == 1 -> single queue */
1549                 qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02);
1550
1551         kfree(chp_dsc);
1552         QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues);
1553         QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level);
1554         return 0;
1555 }
1556
1557 static void qeth_init_qdio_info(struct qeth_card *card)
1558 {
1559         QETH_CARD_TEXT(card, 4, "intqdinf");
1560         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1561         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1562         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1563
1564         /* inbound */
1565         card->qdio.no_in_queues = 1;
1566         card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1567         if (IS_IQD(card))
1568                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1569         else
1570                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1571         card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1572         INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1573         INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1574 }
1575
1576 static void qeth_set_initial_options(struct qeth_card *card)
1577 {
1578         card->options.route4.type = NO_ROUTER;
1579         card->options.route6.type = NO_ROUTER;
1580         card->options.isolation = ISOLATION_MODE_NONE;
1581         card->options.cq = QETH_CQ_DISABLED;
1582         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
1583 }
1584
1585 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1586 {
1587         unsigned long flags;
1588         int rc = 0;
1589
1590         spin_lock_irqsave(&card->thread_mask_lock, flags);
1591         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1592                         (u8) card->thread_start_mask,
1593                         (u8) card->thread_allowed_mask,
1594                         (u8) card->thread_running_mask);
1595         rc = (card->thread_start_mask & thread);
1596         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1597         return rc;
1598 }
1599
1600 static int qeth_do_reset(void *data);
1601 static void qeth_start_kernel_thread(struct work_struct *work)
1602 {
1603         struct task_struct *ts;
1604         struct qeth_card *card = container_of(work, struct qeth_card,
1605                                         kernel_thread_starter);
1606         QETH_CARD_TEXT(card, 2, "strthrd");
1607
1608         if (card->read.state != CH_STATE_UP &&
1609             card->write.state != CH_STATE_UP)
1610                 return;
1611         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1612                 ts = kthread_run(qeth_do_reset, card, "qeth_recover");
1613                 if (IS_ERR(ts)) {
1614                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1615                         qeth_clear_thread_running_bit(card,
1616                                 QETH_RECOVER_THREAD);
1617                 }
1618         }
1619 }
1620
1621 static void qeth_buffer_reclaim_work(struct work_struct *);
1622 static void qeth_setup_card(struct qeth_card *card)
1623 {
1624         QETH_CARD_TEXT(card, 2, "setupcrd");
1625
1626         card->info.type = CARD_RDEV(card)->id.driver_info;
1627         card->state = CARD_STATE_DOWN;
1628         spin_lock_init(&card->lock);
1629         spin_lock_init(&card->thread_mask_lock);
1630         mutex_init(&card->conf_mutex);
1631         mutex_init(&card->discipline_mutex);
1632         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1633         INIT_LIST_HEAD(&card->cmd_waiter_list);
1634         init_waitqueue_head(&card->wait_q);
1635         qeth_set_initial_options(card);
1636         /* IP address takeover */
1637         INIT_LIST_HEAD(&card->ipato.entries);
1638         qeth_init_qdio_info(card);
1639         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1640         INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
1641         hash_init(card->rx_mode_addrs);
1642         hash_init(card->local_addrs4);
1643         hash_init(card->local_addrs6);
1644         spin_lock_init(&card->local_addrs4_lock);
1645         spin_lock_init(&card->local_addrs6_lock);
1646 }
1647
1648 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1649 {
1650         struct qeth_card *card = container_of(slr, struct qeth_card,
1651                                         qeth_service_level);
1652         if (card->info.mcl_level[0])
1653                 seq_printf(m, "qeth: %s firmware level %s\n",
1654                         CARD_BUS_ID(card), card->info.mcl_level);
1655 }
1656
1657 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1658 {
1659         struct qeth_card *card;
1660
1661         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1662         card = kzalloc(sizeof(*card), GFP_KERNEL);
1663         if (!card)
1664                 goto out;
1665         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1666
1667         card->gdev = gdev;
1668         dev_set_drvdata(&gdev->dev, card);
1669         CARD_RDEV(card) = gdev->cdev[0];
1670         CARD_WDEV(card) = gdev->cdev[1];
1671         CARD_DDEV(card) = gdev->cdev[2];
1672
1673         card->event_wq = alloc_ordered_workqueue("%s_event", 0,
1674                                                  dev_name(&gdev->dev));
1675         if (!card->event_wq)
1676                 goto out_wq;
1677
1678         card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0);
1679         if (!card->read_cmd)
1680                 goto out_read_cmd;
1681
1682         card->debugfs = debugfs_create_dir(dev_name(&gdev->dev),
1683                                            qeth_debugfs_root);
1684         debugfs_create_file("local_addrs", 0400, card->debugfs, card,
1685                             &qeth_debugfs_local_addr_fops);
1686
1687         card->qeth_service_level.seq_print = qeth_core_sl_print;
1688         register_service_level(&card->qeth_service_level);
1689         return card;
1690
1691 out_read_cmd:
1692         destroy_workqueue(card->event_wq);
1693 out_wq:
1694         dev_set_drvdata(&gdev->dev, NULL);
1695         kfree(card);
1696 out:
1697         return NULL;
1698 }
1699
1700 static int qeth_clear_channel(struct qeth_card *card,
1701                               struct qeth_channel *channel)
1702 {
1703         int rc;
1704
1705         QETH_CARD_TEXT(card, 3, "clearch");
1706         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1707         rc = ccw_device_clear(channel->ccwdev, (addr_t)channel->active_cmd);
1708         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1709
1710         if (rc)
1711                 return rc;
1712         rc = wait_event_interruptible_timeout(card->wait_q,
1713                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1714         if (rc == -ERESTARTSYS)
1715                 return rc;
1716         if (channel->state != CH_STATE_STOPPED)
1717                 return -ETIME;
1718         channel->state = CH_STATE_DOWN;
1719         return 0;
1720 }
1721
1722 static int qeth_halt_channel(struct qeth_card *card,
1723                              struct qeth_channel *channel)
1724 {
1725         int rc;
1726
1727         QETH_CARD_TEXT(card, 3, "haltch");
1728         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1729         rc = ccw_device_halt(channel->ccwdev, (addr_t)channel->active_cmd);
1730         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1731
1732         if (rc)
1733                 return rc;
1734         rc = wait_event_interruptible_timeout(card->wait_q,
1735                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1736         if (rc == -ERESTARTSYS)
1737                 return rc;
1738         if (channel->state != CH_STATE_HALTED)
1739                 return -ETIME;
1740         return 0;
1741 }
1742
1743 static int qeth_stop_channel(struct qeth_channel *channel)
1744 {
1745         struct ccw_device *cdev = channel->ccwdev;
1746         int rc;
1747
1748         rc = ccw_device_set_offline(cdev);
1749
1750         spin_lock_irq(get_ccwdev_lock(cdev));
1751         if (channel->active_cmd) {
1752                 dev_err(&cdev->dev, "Stopped channel while cmd %px was still active\n",
1753                         channel->active_cmd);
1754                 channel->active_cmd = NULL;
1755         }
1756         cdev->handler = NULL;
1757         spin_unlock_irq(get_ccwdev_lock(cdev));
1758
1759         return rc;
1760 }
1761
1762 static int qeth_start_channel(struct qeth_channel *channel)
1763 {
1764         struct ccw_device *cdev = channel->ccwdev;
1765         int rc;
1766
1767         channel->state = CH_STATE_DOWN;
1768         atomic_set(&channel->irq_pending, 0);
1769
1770         spin_lock_irq(get_ccwdev_lock(cdev));
1771         cdev->handler = qeth_irq;
1772         spin_unlock_irq(get_ccwdev_lock(cdev));
1773
1774         rc = ccw_device_set_online(cdev);
1775         if (rc)
1776                 goto err;
1777
1778         return 0;
1779
1780 err:
1781         spin_lock_irq(get_ccwdev_lock(cdev));
1782         cdev->handler = NULL;
1783         spin_unlock_irq(get_ccwdev_lock(cdev));
1784         return rc;
1785 }
1786
1787 static int qeth_halt_channels(struct qeth_card *card)
1788 {
1789         int rc1 = 0, rc2 = 0, rc3 = 0;
1790
1791         QETH_CARD_TEXT(card, 3, "haltchs");
1792         rc1 = qeth_halt_channel(card, &card->read);
1793         rc2 = qeth_halt_channel(card, &card->write);
1794         rc3 = qeth_halt_channel(card, &card->data);
1795         if (rc1)
1796                 return rc1;
1797         if (rc2)
1798                 return rc2;
1799         return rc3;
1800 }
1801
1802 static int qeth_clear_channels(struct qeth_card *card)
1803 {
1804         int rc1 = 0, rc2 = 0, rc3 = 0;
1805
1806         QETH_CARD_TEXT(card, 3, "clearchs");
1807         rc1 = qeth_clear_channel(card, &card->read);
1808         rc2 = qeth_clear_channel(card, &card->write);
1809         rc3 = qeth_clear_channel(card, &card->data);
1810         if (rc1)
1811                 return rc1;
1812         if (rc2)
1813                 return rc2;
1814         return rc3;
1815 }
1816
1817 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1818 {
1819         int rc = 0;
1820
1821         QETH_CARD_TEXT(card, 3, "clhacrd");
1822
1823         if (halt)
1824                 rc = qeth_halt_channels(card);
1825         if (rc)
1826                 return rc;
1827         return qeth_clear_channels(card);
1828 }
1829
1830 static int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1831 {
1832         int rc = 0;
1833
1834         QETH_CARD_TEXT(card, 3, "qdioclr");
1835         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1836                 QETH_QDIO_CLEANING)) {
1837         case QETH_QDIO_ESTABLISHED:
1838                 if (IS_IQD(card))
1839                         rc = qdio_shutdown(CARD_DDEV(card),
1840                                 QDIO_FLAG_CLEANUP_USING_HALT);
1841                 else
1842                         rc = qdio_shutdown(CARD_DDEV(card),
1843                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1844                 if (rc)
1845                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1846                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1847                 break;
1848         case QETH_QDIO_CLEANING:
1849                 return rc;
1850         default:
1851                 break;
1852         }
1853         rc = qeth_clear_halt_card(card, use_halt);
1854         if (rc)
1855                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1856         return rc;
1857 }
1858
1859 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1860 {
1861         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1862         struct diag26c_vnic_resp *response = NULL;
1863         struct diag26c_vnic_req *request = NULL;
1864         struct ccw_dev_id id;
1865         char userid[80];
1866         int rc = 0;
1867
1868         QETH_CARD_TEXT(card, 2, "vmlayer");
1869
1870         cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1871         if (rc)
1872                 goto out;
1873
1874         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1875         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1876         if (!request || !response) {
1877                 rc = -ENOMEM;
1878                 goto out;
1879         }
1880
1881         ccw_device_get_id(CARD_RDEV(card), &id);
1882         request->resp_buf_len = sizeof(*response);
1883         request->resp_version = DIAG26C_VERSION6_VM65918;
1884         request->req_format = DIAG26C_VNIC_INFO;
1885         ASCEBC(userid, 8);
1886         memcpy(&request->sys_name, userid, 8);
1887         request->devno = id.devno;
1888
1889         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1890         rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1891         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1892         if (rc)
1893                 goto out;
1894         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1895
1896         if (request->resp_buf_len < sizeof(*response) ||
1897             response->version != request->resp_version) {
1898                 rc = -EIO;
1899                 goto out;
1900         }
1901
1902         if (response->protocol == VNIC_INFO_PROT_L2)
1903                 disc = QETH_DISCIPLINE_LAYER2;
1904         else if (response->protocol == VNIC_INFO_PROT_L3)
1905                 disc = QETH_DISCIPLINE_LAYER3;
1906
1907 out:
1908         kfree(response);
1909         kfree(request);
1910         if (rc)
1911                 QETH_CARD_TEXT_(card, 2, "err%x", rc);
1912         return disc;
1913 }
1914
1915 /* Determine whether the device requires a specific layer discipline */
1916 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1917 {
1918         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1919
1920         if (IS_OSM(card) || IS_OSN(card))
1921                 disc = QETH_DISCIPLINE_LAYER2;
1922         else if (IS_VM_NIC(card))
1923                 disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
1924                                       qeth_vm_detect_layer(card);
1925
1926         switch (disc) {
1927         case QETH_DISCIPLINE_LAYER2:
1928                 QETH_CARD_TEXT(card, 3, "force l2");
1929                 break;
1930         case QETH_DISCIPLINE_LAYER3:
1931                 QETH_CARD_TEXT(card, 3, "force l3");
1932                 break;
1933         default:
1934                 QETH_CARD_TEXT(card, 3, "force no");
1935         }
1936
1937         return disc;
1938 }
1939
1940 static void qeth_set_blkt_defaults(struct qeth_card *card)
1941 {
1942         QETH_CARD_TEXT(card, 2, "cfgblkt");
1943
1944         if (card->info.use_v1_blkt) {
1945                 card->info.blkt.time_total = 0;
1946                 card->info.blkt.inter_packet = 0;
1947                 card->info.blkt.inter_packet_jumbo = 0;
1948         } else {
1949                 card->info.blkt.time_total = 250;
1950                 card->info.blkt.inter_packet = 5;
1951                 card->info.blkt.inter_packet_jumbo = 15;
1952         }
1953 }
1954
1955 static void qeth_idx_init(struct qeth_card *card)
1956 {
1957         memset(&card->seqno, 0, sizeof(card->seqno));
1958
1959         card->token.issuer_rm_w = 0x00010103UL;
1960         card->token.cm_filter_w = 0x00010108UL;
1961         card->token.cm_connection_w = 0x0001010aUL;
1962         card->token.ulp_filter_w = 0x0001010bUL;
1963         card->token.ulp_connection_w = 0x0001010dUL;
1964
1965         switch (card->info.type) {
1966         case QETH_CARD_TYPE_IQD:
1967                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1968                 break;
1969         case QETH_CARD_TYPE_OSD:
1970         case QETH_CARD_TYPE_OSN:
1971                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1972                 break;
1973         default:
1974                 break;
1975         }
1976 }
1977
1978 static void qeth_idx_finalize_cmd(struct qeth_card *card,
1979                                   struct qeth_cmd_buffer *iob)
1980 {
1981         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
1982                QETH_SEQ_NO_LENGTH);
1983         if (iob->channel == &card->write)
1984                 card->seqno.trans_hdr++;
1985 }
1986
1987 static int qeth_peer_func_level(int level)
1988 {
1989         if ((level & 0xff) == 8)
1990                 return (level & 0xff) + 0x400;
1991         if (((level >> 8) & 3) == 1)
1992                 return (level & 0xff) + 0x200;
1993         return level;
1994 }
1995
1996 static void qeth_mpc_finalize_cmd(struct qeth_card *card,
1997                                   struct qeth_cmd_buffer *iob)
1998 {
1999         qeth_idx_finalize_cmd(card, iob);
2000
2001         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
2002                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
2003         card->seqno.pdu_hdr++;
2004         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
2005                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
2006
2007         iob->callback = qeth_release_buffer_cb;
2008 }
2009
2010 static bool qeth_mpc_match_reply(struct qeth_cmd_buffer *iob,
2011                                  struct qeth_cmd_buffer *reply)
2012 {
2013         /* MPC cmds are issued strictly in sequence. */
2014         return !IS_IPA(reply->data);
2015 }
2016
2017 static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
2018                                                   const void *data,
2019                                                   unsigned int data_length)
2020 {
2021         struct qeth_cmd_buffer *iob;
2022
2023         iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT);
2024         if (!iob)
2025                 return NULL;
2026
2027         memcpy(iob->data, data, data_length);
2028         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length,
2029                        iob->data);
2030         iob->finalize = qeth_mpc_finalize_cmd;
2031         iob->match = qeth_mpc_match_reply;
2032         return iob;
2033 }
2034
2035 /**
2036  * qeth_send_control_data() -   send control command to the card
2037  * @card:                       qeth_card structure pointer
2038  * @iob:                        qeth_cmd_buffer pointer
2039  * @reply_cb:                   callback function pointer
2040  * @cb_card:                    pointer to the qeth_card structure
2041  * @cb_reply:                   pointer to the qeth_reply structure
2042  * @cb_cmd:                     pointer to the original iob for non-IPA
2043  *                              commands, or to the qeth_ipa_cmd structure
2044  *                              for the IPA commands.
2045  * @reply_param:                private pointer passed to the callback
2046  *
2047  * Callback function gets called one or more times, with cb_cmd
2048  * pointing to the response returned by the hardware. Callback
2049  * function must return
2050  *   > 0 if more reply blocks are expected,
2051  *     0 if the last or only reply block is received, and
2052  *   < 0 on error.
2053  * Callback function can get the value of the reply_param pointer from the
2054  * field 'param' of the structure qeth_reply.
2055  */
2056
2057 static int qeth_send_control_data(struct qeth_card *card,
2058                                   struct qeth_cmd_buffer *iob,
2059                                   int (*reply_cb)(struct qeth_card *cb_card,
2060                                                   struct qeth_reply *cb_reply,
2061                                                   unsigned long cb_cmd),
2062                                   void *reply_param)
2063 {
2064         struct qeth_channel *channel = iob->channel;
2065         struct qeth_reply *reply = &iob->reply;
2066         long timeout = iob->timeout;
2067         int rc;
2068
2069         QETH_CARD_TEXT(card, 2, "sendctl");
2070
2071         reply->callback = reply_cb;
2072         reply->param = reply_param;
2073
2074         timeout = wait_event_interruptible_timeout(card->wait_q,
2075                                                    qeth_trylock_channel(channel),
2076                                                    timeout);
2077         if (timeout <= 0) {
2078                 qeth_put_cmd(iob);
2079                 return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2080         }
2081
2082         if (iob->finalize)
2083                 iob->finalize(card, iob);
2084         QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN));
2085
2086         qeth_enqueue_cmd(card, iob);
2087
2088         /* This pairs with iob->callback, and keeps the iob alive after IO: */
2089         qeth_get_cmd(iob);
2090
2091         QETH_CARD_TEXT(card, 6, "noirqpnd");
2092         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
2093         rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob),
2094                                       (addr_t) iob, 0, 0, timeout);
2095         if (!rc)
2096                 channel->active_cmd = iob;
2097         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
2098         if (rc) {
2099                 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
2100                                  CARD_DEVID(card), rc);
2101                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
2102                 qeth_dequeue_cmd(card, iob);
2103                 qeth_put_cmd(iob);
2104                 qeth_unlock_channel(card, channel);
2105                 goto out;
2106         }
2107
2108         timeout = wait_for_completion_interruptible_timeout(&iob->done,
2109                                                             timeout);
2110         if (timeout <= 0)
2111                 rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2112
2113         qeth_dequeue_cmd(card, iob);
2114
2115         if (reply_cb) {
2116                 /* Wait until the callback for a late reply has completed: */
2117                 spin_lock_irq(&iob->lock);
2118                 if (rc)
2119                         /* Zap any callback that's still pending: */
2120                         iob->rc = rc;
2121                 spin_unlock_irq(&iob->lock);
2122         }
2123
2124         if (!rc)
2125                 rc = iob->rc;
2126
2127 out:
2128         qeth_put_cmd(iob);
2129         return rc;
2130 }
2131
2132 struct qeth_node_desc {
2133         struct node_descriptor nd1;
2134         struct node_descriptor nd2;
2135         struct node_descriptor nd3;
2136 };
2137
2138 static void qeth_read_conf_data_cb(struct qeth_card *card,
2139                                    struct qeth_cmd_buffer *iob,
2140                                    unsigned int data_length)
2141 {
2142         struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data;
2143         int rc = 0;
2144         u8 *tag;
2145
2146         QETH_CARD_TEXT(card, 2, "cfgunit");
2147
2148         if (data_length < sizeof(*nd)) {
2149                 rc = -EINVAL;
2150                 goto out;
2151         }
2152
2153         card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] &&
2154                                nd->nd1.plant[1] == _ascebc['M'];
2155         tag = (u8 *)&nd->nd1.tag;
2156         card->info.chpid = tag[0];
2157         card->info.unit_addr2 = tag[1];
2158
2159         tag = (u8 *)&nd->nd2.tag;
2160         card->info.cula = tag[1];
2161
2162         card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 &&
2163                                  nd->nd3.model[1] == 0xF0 &&
2164                                  nd->nd3.model[2] >= 0xF1 &&
2165                                  nd->nd3.model[2] <= 0xF4;
2166
2167 out:
2168         qeth_notify_cmd(iob, rc);
2169         qeth_put_cmd(iob);
2170 }
2171
2172 static int qeth_read_conf_data(struct qeth_card *card)
2173 {
2174         struct qeth_channel *channel = &card->data;
2175         struct qeth_cmd_buffer *iob;
2176         struct ciw *ciw;
2177
2178         /* scan for RCD command in extended SenseID data */
2179         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
2180         if (!ciw || ciw->cmd == 0)
2181                 return -EOPNOTSUPP;
2182         if (ciw->count < sizeof(struct qeth_node_desc))
2183                 return -EINVAL;
2184
2185         iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT);
2186         if (!iob)
2187                 return -ENOMEM;
2188
2189         iob->callback = qeth_read_conf_data_cb;
2190         qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length,
2191                        iob->data);
2192
2193         return qeth_send_control_data(card, iob, NULL, NULL);
2194 }
2195
2196 static int qeth_idx_check_activate_response(struct qeth_card *card,
2197                                             struct qeth_channel *channel,
2198                                             struct qeth_cmd_buffer *iob)
2199 {
2200         int rc;
2201
2202         rc = qeth_check_idx_response(card, iob->data);
2203         if (rc)
2204                 return rc;
2205
2206         if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
2207                 return 0;
2208
2209         /* negative reply: */
2210         QETH_CARD_TEXT_(card, 2, "idxneg%c",
2211                         QETH_IDX_ACT_CAUSE_CODE(iob->data));
2212
2213         switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
2214         case QETH_IDX_ACT_ERR_EXCL:
2215                 dev_err(&channel->ccwdev->dev,
2216                         "The adapter is used exclusively by another host\n");
2217                 return -EBUSY;
2218         case QETH_IDX_ACT_ERR_AUTH:
2219         case QETH_IDX_ACT_ERR_AUTH_USER:
2220                 dev_err(&channel->ccwdev->dev,
2221                         "Setting the device online failed because of insufficient authorization\n");
2222                 return -EPERM;
2223         default:
2224                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
2225                                  CCW_DEVID(channel->ccwdev));
2226                 return -EIO;
2227         }
2228 }
2229
2230 static void qeth_idx_activate_read_channel_cb(struct qeth_card *card,
2231                                               struct qeth_cmd_buffer *iob,
2232                                               unsigned int data_length)
2233 {
2234         struct qeth_channel *channel = iob->channel;
2235         u16 peer_level;
2236         int rc;
2237
2238         QETH_CARD_TEXT(card, 2, "idxrdcb");
2239
2240         rc = qeth_idx_check_activate_response(card, channel, iob);
2241         if (rc)
2242                 goto out;
2243
2244         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2245         if (peer_level != qeth_peer_func_level(card->info.func_level)) {
2246                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2247                                  CCW_DEVID(channel->ccwdev),
2248                                  card->info.func_level, peer_level);
2249                 rc = -EINVAL;
2250                 goto out;
2251         }
2252
2253         memcpy(&card->token.issuer_rm_r,
2254                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2255                QETH_MPC_TOKEN_LENGTH);
2256         memcpy(&card->info.mcl_level[0],
2257                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2258
2259 out:
2260         qeth_notify_cmd(iob, rc);
2261         qeth_put_cmd(iob);
2262 }
2263
2264 static void qeth_idx_activate_write_channel_cb(struct qeth_card *card,
2265                                                struct qeth_cmd_buffer *iob,
2266                                                unsigned int data_length)
2267 {
2268         struct qeth_channel *channel = iob->channel;
2269         u16 peer_level;
2270         int rc;
2271
2272         QETH_CARD_TEXT(card, 2, "idxwrcb");
2273
2274         rc = qeth_idx_check_activate_response(card, channel, iob);
2275         if (rc)
2276                 goto out;
2277
2278         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2279         if ((peer_level & ~0x0100) !=
2280             qeth_peer_func_level(card->info.func_level)) {
2281                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2282                                  CCW_DEVID(channel->ccwdev),
2283                                  card->info.func_level, peer_level);
2284                 rc = -EINVAL;
2285         }
2286
2287 out:
2288         qeth_notify_cmd(iob, rc);
2289         qeth_put_cmd(iob);
2290 }
2291
2292 static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
2293                                         struct qeth_cmd_buffer *iob)
2294 {
2295         u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
2296         u8 port = ((u8)card->dev->dev_port) | 0x80;
2297         struct ccw1 *ccw = __ccw_from_cmd(iob);
2298
2299         qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE,
2300                        iob->data);
2301         qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data);
2302         iob->finalize = qeth_idx_finalize_cmd;
2303
2304         port |= QETH_IDX_ACT_INVAL_FRAME;
2305         memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
2306         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2307                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
2308         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
2309                &card->info.func_level, 2);
2310         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &card->info.ddev_devno, 2);
2311         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
2312 }
2313
2314 static int qeth_idx_activate_read_channel(struct qeth_card *card)
2315 {
2316         struct qeth_channel *channel = &card->read;
2317         struct qeth_cmd_buffer *iob;
2318         int rc;
2319
2320         QETH_CARD_TEXT(card, 2, "idxread");
2321
2322         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2323         if (!iob)
2324                 return -ENOMEM;
2325
2326         memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
2327         qeth_idx_setup_activate_cmd(card, iob);
2328         iob->callback = qeth_idx_activate_read_channel_cb;
2329
2330         rc = qeth_send_control_data(card, iob, NULL, NULL);
2331         if (rc)
2332                 return rc;
2333
2334         channel->state = CH_STATE_UP;
2335         return 0;
2336 }
2337
2338 static int qeth_idx_activate_write_channel(struct qeth_card *card)
2339 {
2340         struct qeth_channel *channel = &card->write;
2341         struct qeth_cmd_buffer *iob;
2342         int rc;
2343
2344         QETH_CARD_TEXT(card, 2, "idxwrite");
2345
2346         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2347         if (!iob)
2348                 return -ENOMEM;
2349
2350         memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
2351         qeth_idx_setup_activate_cmd(card, iob);
2352         iob->callback = qeth_idx_activate_write_channel_cb;
2353
2354         rc = qeth_send_control_data(card, iob, NULL, NULL);
2355         if (rc)
2356                 return rc;
2357
2358         channel->state = CH_STATE_UP;
2359         return 0;
2360 }
2361
2362 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2363                 unsigned long data)
2364 {
2365         struct qeth_cmd_buffer *iob;
2366
2367         QETH_CARD_TEXT(card, 2, "cmenblcb");
2368
2369         iob = (struct qeth_cmd_buffer *) data;
2370         memcpy(&card->token.cm_filter_r,
2371                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2372                QETH_MPC_TOKEN_LENGTH);
2373         return 0;
2374 }
2375
2376 static int qeth_cm_enable(struct qeth_card *card)
2377 {
2378         struct qeth_cmd_buffer *iob;
2379
2380         QETH_CARD_TEXT(card, 2, "cmenable");
2381
2382         iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
2383         if (!iob)
2384                 return -ENOMEM;
2385
2386         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2387                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2388         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2389                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2390
2391         return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL);
2392 }
2393
2394 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2395                 unsigned long data)
2396 {
2397         struct qeth_cmd_buffer *iob;
2398
2399         QETH_CARD_TEXT(card, 2, "cmsetpcb");
2400
2401         iob = (struct qeth_cmd_buffer *) data;
2402         memcpy(&card->token.cm_connection_r,
2403                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2404                QETH_MPC_TOKEN_LENGTH);
2405         return 0;
2406 }
2407
2408 static int qeth_cm_setup(struct qeth_card *card)
2409 {
2410         struct qeth_cmd_buffer *iob;
2411
2412         QETH_CARD_TEXT(card, 2, "cmsetup");
2413
2414         iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
2415         if (!iob)
2416                 return -ENOMEM;
2417
2418         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2419                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2420         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2421                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2422         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2423                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2424         return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
2425 }
2426
2427 static bool qeth_is_supported_link_type(struct qeth_card *card, u8 link_type)
2428 {
2429         if (link_type == QETH_LINK_TYPE_LANE_TR ||
2430             link_type == QETH_LINK_TYPE_HSTR) {
2431                 dev_err(&card->gdev->dev, "Unsupported Token Ring device\n");
2432                 return false;
2433         }
2434
2435         return true;
2436 }
2437
2438 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2439 {
2440         struct net_device *dev = card->dev;
2441         unsigned int new_mtu;
2442
2443         if (!max_mtu) {
2444                 /* IQD needs accurate max MTU to set up its RX buffers: */
2445                 if (IS_IQD(card))
2446                         return -EINVAL;
2447                 /* tolerate quirky HW: */
2448                 max_mtu = ETH_MAX_MTU;
2449         }
2450
2451         rtnl_lock();
2452         if (IS_IQD(card)) {
2453                 /* move any device with default MTU to new max MTU: */
2454                 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2455
2456                 /* adjust RX buffer size to new max MTU: */
2457                 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2458                 if (dev->max_mtu && dev->max_mtu != max_mtu)
2459                         qeth_free_qdio_queues(card);
2460         } else {
2461                 if (dev->mtu)
2462                         new_mtu = dev->mtu;
2463                 /* default MTUs for first setup: */
2464                 else if (IS_LAYER2(card))
2465                         new_mtu = ETH_DATA_LEN;
2466                 else
2467                         new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2468         }
2469
2470         dev->max_mtu = max_mtu;
2471         dev->mtu = min(new_mtu, max_mtu);
2472         rtnl_unlock();
2473         return 0;
2474 }
2475
2476 static int qeth_get_mtu_outof_framesize(int framesize)
2477 {
2478         switch (framesize) {
2479         case 0x4000:
2480                 return 8192;
2481         case 0x6000:
2482                 return 16384;
2483         case 0xa000:
2484                 return 32768;
2485         case 0xffff:
2486                 return 57344;
2487         default:
2488                 return 0;
2489         }
2490 }
2491
2492 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2493                 unsigned long data)
2494 {
2495         __u16 mtu, framesize;
2496         __u16 len;
2497         struct qeth_cmd_buffer *iob;
2498         u8 link_type = 0;
2499
2500         QETH_CARD_TEXT(card, 2, "ulpenacb");
2501
2502         iob = (struct qeth_cmd_buffer *) data;
2503         memcpy(&card->token.ulp_filter_r,
2504                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2505                QETH_MPC_TOKEN_LENGTH);
2506         if (IS_IQD(card)) {
2507                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2508                 mtu = qeth_get_mtu_outof_framesize(framesize);
2509         } else {
2510                 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2511         }
2512         *(u16 *)reply->param = mtu;
2513
2514         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2515         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2516                 memcpy(&link_type,
2517                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2518                 if (!qeth_is_supported_link_type(card, link_type))
2519                         return -EPROTONOSUPPORT;
2520         }
2521
2522         card->info.link_type = link_type;
2523         QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
2524         return 0;
2525 }
2526
2527 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2528 {
2529         if (IS_OSN(card))
2530                 return QETH_PROT_OSN2;
2531         return IS_LAYER2(card) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP;
2532 }
2533
2534 static int qeth_ulp_enable(struct qeth_card *card)
2535 {
2536         u8 prot_type = qeth_mpc_select_prot_type(card);
2537         struct qeth_cmd_buffer *iob;
2538         u16 max_mtu;
2539         int rc;
2540
2541         QETH_CARD_TEXT(card, 2, "ulpenabl");
2542
2543         iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
2544         if (!iob)
2545                 return -ENOMEM;
2546
2547         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2548         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2549         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2550                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2551         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2552                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2553         rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
2554         if (rc)
2555                 return rc;
2556         return qeth_update_max_mtu(card, max_mtu);
2557 }
2558
2559 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2560                 unsigned long data)
2561 {
2562         struct qeth_cmd_buffer *iob;
2563
2564         QETH_CARD_TEXT(card, 2, "ulpstpcb");
2565
2566         iob = (struct qeth_cmd_buffer *) data;
2567         memcpy(&card->token.ulp_connection_r,
2568                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2569                QETH_MPC_TOKEN_LENGTH);
2570         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2571                      3)) {
2572                 QETH_CARD_TEXT(card, 2, "olmlimit");
2573                 dev_err(&card->gdev->dev, "A connection could not be "
2574                         "established because of an OLM limit\n");
2575                 return -EMLINK;
2576         }
2577         return 0;
2578 }
2579
2580 static int qeth_ulp_setup(struct qeth_card *card)
2581 {
2582         __u16 temp;
2583         struct qeth_cmd_buffer *iob;
2584
2585         QETH_CARD_TEXT(card, 2, "ulpsetup");
2586
2587         iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
2588         if (!iob)
2589                 return -ENOMEM;
2590
2591         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2592                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2593         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2594                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2595         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2596                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2597
2598         memcpy(QETH_ULP_SETUP_CUA(iob->data), &card->info.ddev_devno, 2);
2599         temp = (card->info.cula << 8) + card->info.unit_addr2;
2600         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2601         return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL);
2602 }
2603
2604 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2605 {
2606         struct qeth_qdio_out_buffer *newbuf;
2607
2608         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2609         if (!newbuf)
2610                 return -ENOMEM;
2611
2612         newbuf->buffer = q->qdio_bufs[bidx];
2613         skb_queue_head_init(&newbuf->skb_list);
2614         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2615         newbuf->q = q;
2616         newbuf->next_pending = q->bufs[bidx];
2617         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2618         q->bufs[bidx] = newbuf;
2619         return 0;
2620 }
2621
2622 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2623 {
2624         if (!q)
2625                 return;
2626
2627         qeth_drain_output_queue(q, true);
2628         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2629         kfree(q);
2630 }
2631
2632 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2633 {
2634         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2635
2636         if (!q)
2637                 return NULL;
2638
2639         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
2640                 kfree(q);
2641                 return NULL;
2642         }
2643         return q;
2644 }
2645
2646 static void qeth_tx_completion_timer(struct timer_list *timer)
2647 {
2648         struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer);
2649
2650         napi_schedule(&queue->napi);
2651         QETH_TXQ_STAT_INC(queue, completion_timer);
2652 }
2653
2654 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2655 {
2656         int i, j;
2657
2658         QETH_CARD_TEXT(card, 2, "allcqdbf");
2659
2660         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2661                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2662                 return 0;
2663
2664         QETH_CARD_TEXT(card, 2, "inq");
2665         card->qdio.in_q = qeth_alloc_qdio_queue();
2666         if (!card->qdio.in_q)
2667                 goto out_nomem;
2668
2669         /* inbound buffer pool */
2670         if (qeth_alloc_buffer_pool(card))
2671                 goto out_freeinq;
2672
2673         /* outbound */
2674         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2675                 struct qeth_qdio_out_q *queue;
2676
2677                 queue = qeth_alloc_output_queue();
2678                 if (!queue)
2679                         goto out_freeoutq;
2680                 QETH_CARD_TEXT_(card, 2, "outq %i", i);
2681                 QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
2682                 card->qdio.out_qs[i] = queue;
2683                 queue->card = card;
2684                 queue->queue_no = i;
2685                 spin_lock_init(&queue->lock);
2686                 timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
2687                 queue->coalesce_usecs = QETH_TX_COALESCE_USECS;
2688                 queue->max_coalesced_frames = QETH_TX_MAX_COALESCED_FRAMES;
2689                 queue->priority = QETH_QIB_PQUE_PRIO_DEFAULT;
2690
2691                 /* give outbound qeth_qdio_buffers their qdio_buffers */
2692                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2693                         WARN_ON(queue->bufs[j]);
2694                         if (qeth_init_qdio_out_buf(queue, j))
2695                                 goto out_freeoutqbufs;
2696                 }
2697         }
2698
2699         /* completion */
2700         if (qeth_alloc_cq(card))
2701                 goto out_freeoutq;
2702
2703         return 0;
2704
2705 out_freeoutqbufs:
2706         while (j > 0) {
2707                 --j;
2708                 kmem_cache_free(qeth_qdio_outbuf_cache,
2709                                 card->qdio.out_qs[i]->bufs[j]);
2710                 card->qdio.out_qs[i]->bufs[j] = NULL;
2711         }
2712 out_freeoutq:
2713         while (i > 0) {
2714                 qeth_free_output_queue(card->qdio.out_qs[--i]);
2715                 card->qdio.out_qs[i] = NULL;
2716         }
2717         qeth_free_buffer_pool(card);
2718 out_freeinq:
2719         qeth_free_qdio_queue(card->qdio.in_q);
2720         card->qdio.in_q = NULL;
2721 out_nomem:
2722         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2723         return -ENOMEM;
2724 }
2725
2726 static void qeth_free_qdio_queues(struct qeth_card *card)
2727 {
2728         int i, j;
2729
2730         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2731                 QETH_QDIO_UNINITIALIZED)
2732                 return;
2733
2734         qeth_free_cq(card);
2735         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2736                 if (card->qdio.in_q->bufs[j].rx_skb)
2737                         dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2738         }
2739         qeth_free_qdio_queue(card->qdio.in_q);
2740         card->qdio.in_q = NULL;
2741         /* inbound buffer pool */
2742         qeth_free_buffer_pool(card);
2743         /* free outbound qdio_qs */
2744         for (i = 0; i < card->qdio.no_out_queues; i++) {
2745                 qeth_free_output_queue(card->qdio.out_qs[i]);
2746                 card->qdio.out_qs[i] = NULL;
2747         }
2748 }
2749
2750 static void qeth_fill_qib_parms(struct qeth_card *card,
2751                                 struct qeth_qib_parms *parms)
2752 {
2753         struct qeth_qdio_out_q *queue;
2754         unsigned int i;
2755
2756         parms->pcit_magic[0] = 'P';
2757         parms->pcit_magic[1] = 'C';
2758         parms->pcit_magic[2] = 'I';
2759         parms->pcit_magic[3] = 'T';
2760         ASCEBC(parms->pcit_magic, sizeof(parms->pcit_magic));
2761         parms->pcit_a = QETH_PCI_THRESHOLD_A(card);
2762         parms->pcit_b = QETH_PCI_THRESHOLD_B(card);
2763         parms->pcit_c = QETH_PCI_TIMER_VALUE(card);
2764
2765         parms->blkt_magic[0] = 'B';
2766         parms->blkt_magic[1] = 'L';
2767         parms->blkt_magic[2] = 'K';
2768         parms->blkt_magic[3] = 'T';
2769         ASCEBC(parms->blkt_magic, sizeof(parms->blkt_magic));
2770         parms->blkt_total = card->info.blkt.time_total;
2771         parms->blkt_inter_packet = card->info.blkt.inter_packet;
2772         parms->blkt_inter_packet_jumbo = card->info.blkt.inter_packet_jumbo;
2773
2774         /* Prio-queueing implicitly uses the default priorities: */
2775         if (qeth_uses_tx_prio_queueing(card) || card->qdio.no_out_queues == 1)
2776                 return;
2777
2778         parms->pque_magic[0] = 'P';
2779         parms->pque_magic[1] = 'Q';
2780         parms->pque_magic[2] = 'U';
2781         parms->pque_magic[3] = 'E';
2782         ASCEBC(parms->pque_magic, sizeof(parms->pque_magic));
2783         parms->pque_order = QETH_QIB_PQUE_ORDER_RR;
2784         parms->pque_units = QETH_QIB_PQUE_UNITS_SBAL;
2785
2786         qeth_for_each_output_queue(card, queue, i)
2787                 parms->pque_priority[i] = queue->priority;
2788 }
2789
2790 static int qeth_qdio_activate(struct qeth_card *card)
2791 {
2792         QETH_CARD_TEXT(card, 3, "qdioact");
2793         return qdio_activate(CARD_DDEV(card));
2794 }
2795
2796 static int qeth_dm_act(struct qeth_card *card)
2797 {
2798         struct qeth_cmd_buffer *iob;
2799
2800         QETH_CARD_TEXT(card, 2, "dmact");
2801
2802         iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
2803         if (!iob)
2804                 return -ENOMEM;
2805
2806         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2807                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2808         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2809                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2810         return qeth_send_control_data(card, iob, NULL, NULL);
2811 }
2812
2813 static int qeth_mpc_initialize(struct qeth_card *card)
2814 {
2815         int rc;
2816
2817         QETH_CARD_TEXT(card, 2, "mpcinit");
2818
2819         rc = qeth_issue_next_read(card);
2820         if (rc) {
2821                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2822                 return rc;
2823         }
2824         rc = qeth_cm_enable(card);
2825         if (rc) {
2826                 QETH_CARD_TEXT_(card, 2, "2err%d", rc);
2827                 return rc;
2828         }
2829         rc = qeth_cm_setup(card);
2830         if (rc) {
2831                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2832                 return rc;
2833         }
2834         rc = qeth_ulp_enable(card);
2835         if (rc) {
2836                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
2837                 return rc;
2838         }
2839         rc = qeth_ulp_setup(card);
2840         if (rc) {
2841                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2842                 return rc;
2843         }
2844         rc = qeth_alloc_qdio_queues(card);
2845         if (rc) {
2846                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2847                 return rc;
2848         }
2849         rc = qeth_qdio_establish(card);
2850         if (rc) {
2851                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2852                 qeth_free_qdio_queues(card);
2853                 return rc;
2854         }
2855         rc = qeth_qdio_activate(card);
2856         if (rc) {
2857                 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
2858                 return rc;
2859         }
2860         rc = qeth_dm_act(card);
2861         if (rc) {
2862                 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
2863                 return rc;
2864         }
2865
2866         return 0;
2867 }
2868
2869 static void qeth_print_status_message(struct qeth_card *card)
2870 {
2871         switch (card->info.type) {
2872         case QETH_CARD_TYPE_OSD:
2873         case QETH_CARD_TYPE_OSM:
2874         case QETH_CARD_TYPE_OSX:
2875                 /* VM will use a non-zero first character
2876                  * to indicate a HiperSockets like reporting
2877                  * of the level OSA sets the first character to zero
2878                  * */
2879                 if (!card->info.mcl_level[0]) {
2880                         sprintf(card->info.mcl_level, "%02x%02x",
2881                                 card->info.mcl_level[2],
2882                                 card->info.mcl_level[3]);
2883                         break;
2884                 }
2885                 fallthrough;
2886         case QETH_CARD_TYPE_IQD:
2887                 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2888                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2889                                 card->info.mcl_level[0]];
2890                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2891                                 card->info.mcl_level[1]];
2892                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2893                                 card->info.mcl_level[2]];
2894                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2895                                 card->info.mcl_level[3]];
2896                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2897                 }
2898                 break;
2899         default:
2900                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2901         }
2902         dev_info(&card->gdev->dev,
2903                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2904                  qeth_get_cardname(card),
2905                  (card->info.mcl_level[0]) ? " (level: " : "",
2906                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2907                  (card->info.mcl_level[0]) ? ")" : "",
2908                  qeth_get_cardname_short(card));
2909 }
2910
2911 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2912 {
2913         struct qeth_buffer_pool_entry *entry;
2914
2915         QETH_CARD_TEXT(card, 5, "inwrklst");
2916
2917         list_for_each_entry(entry,
2918                             &card->qdio.init_pool.entry_list, init_list) {
2919                 qeth_put_buffer_pool_entry(card, entry);
2920         }
2921 }
2922
2923 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2924                                         struct qeth_card *card)
2925 {
2926         struct qeth_buffer_pool_entry *entry;
2927         int i, free;
2928
2929         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2930                 return NULL;
2931
2932         list_for_each_entry(entry, &card->qdio.in_buf_pool.entry_list, list) {
2933                 free = 1;
2934                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2935                         if (page_count(entry->elements[i]) > 1) {
2936                                 free = 0;
2937                                 break;
2938                         }
2939                 }
2940                 if (free) {
2941                         list_del_init(&entry->list);
2942                         return entry;
2943                 }
2944         }
2945
2946         /* no free buffer in pool so take first one and swap pages */
2947         entry = list_first_entry(&card->qdio.in_buf_pool.entry_list,
2948                                  struct qeth_buffer_pool_entry, list);
2949         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2950                 if (page_count(entry->elements[i]) > 1) {
2951                         struct page *page = dev_alloc_page();
2952
2953                         if (!page)
2954                                 return NULL;
2955
2956                         __free_page(entry->elements[i]);
2957                         entry->elements[i] = page;
2958                         QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2959                 }
2960         }
2961         list_del_init(&entry->list);
2962         return entry;
2963 }
2964
2965 static int qeth_init_input_buffer(struct qeth_card *card,
2966                 struct qeth_qdio_buffer *buf)
2967 {
2968         struct qeth_buffer_pool_entry *pool_entry = buf->pool_entry;
2969         int i;
2970
2971         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2972                 buf->rx_skb = netdev_alloc_skb(card->dev,
2973                                                ETH_HLEN +
2974                                                sizeof(struct ipv6hdr));
2975                 if (!buf->rx_skb)
2976                         return -ENOMEM;
2977         }
2978
2979         if (!pool_entry) {
2980                 pool_entry = qeth_find_free_buffer_pool_entry(card);
2981                 if (!pool_entry)
2982                         return -ENOBUFS;
2983
2984                 buf->pool_entry = pool_entry;
2985         }
2986
2987         /*
2988          * since the buffer is accessed only from the input_tasklet
2989          * there shouldn't be a need to synchronize; also, since we use
2990          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2991          * buffers
2992          */
2993         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2994                 buf->buffer->element[i].length = PAGE_SIZE;
2995                 buf->buffer->element[i].addr =
2996                         page_to_phys(pool_entry->elements[i]);
2997                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2998                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2999                 else
3000                         buf->buffer->element[i].eflags = 0;
3001                 buf->buffer->element[i].sflags = 0;
3002         }
3003         return 0;
3004 }
3005
3006 static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card,
3007                                             struct qeth_qdio_out_q *queue)
3008 {
3009         if (!IS_IQD(card) ||
3010             qeth_iqd_is_mcast_queue(card, queue) ||
3011             card->options.cq == QETH_CQ_ENABLED ||
3012             qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd))
3013                 return 1;
3014
3015         return card->ssqd.mmwc ? card->ssqd.mmwc : 1;
3016 }
3017
3018 static int qeth_init_qdio_queues(struct qeth_card *card)
3019 {
3020         unsigned int rx_bufs = card->qdio.in_buf_pool.buf_count;
3021         unsigned int i;
3022         int rc;
3023
3024         QETH_CARD_TEXT(card, 2, "initqdqs");
3025
3026         /* inbound queue */
3027         qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
3028         memset(&card->rx, 0, sizeof(struct qeth_rx));
3029
3030         qeth_initialize_working_pool_list(card);
3031         /*give only as many buffers to hardware as we have buffer pool entries*/
3032         for (i = 0; i < rx_bufs; i++) {
3033                 rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
3034                 if (rc)
3035                         return rc;
3036         }
3037
3038         card->qdio.in_q->next_buf_to_init = QDIO_BUFNR(rx_bufs);
3039         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0, rx_bufs);
3040         if (rc) {
3041                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
3042                 return rc;
3043         }
3044
3045         /* completion */
3046         rc = qeth_cq_init(card);
3047         if (rc) {
3048                 return rc;
3049         }
3050
3051         /* outbound queue */
3052         for (i = 0; i < card->qdio.no_out_queues; ++i) {
3053                 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
3054
3055                 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
3056                 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
3057                 queue->next_buf_to_fill = 0;
3058                 queue->do_pack = 0;
3059                 queue->prev_hdr = NULL;
3060                 queue->coalesced_frames = 0;
3061                 queue->bulk_start = 0;
3062                 queue->bulk_count = 0;
3063                 queue->bulk_max = qeth_tx_select_bulk_max(card, queue);
3064                 atomic_set(&queue->used_buffers, 0);
3065                 atomic_set(&queue->set_pci_flags_count, 0);
3066                 netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
3067         }
3068         return 0;
3069 }
3070
3071 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
3072                                   struct qeth_cmd_buffer *iob)
3073 {
3074         qeth_mpc_finalize_cmd(card, iob);
3075
3076         /* override with IPA-specific values: */
3077         __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
3078 }
3079
3080 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3081                           u16 cmd_length,
3082                           bool (*match)(struct qeth_cmd_buffer *iob,
3083                                         struct qeth_cmd_buffer *reply))
3084 {
3085         u8 prot_type = qeth_mpc_select_prot_type(card);
3086         u16 total_length = iob->length;
3087
3088         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
3089                        iob->data);
3090         iob->finalize = qeth_ipa_finalize_cmd;
3091         iob->match = match;
3092
3093         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
3094         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
3095         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
3096         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
3097         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
3098         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
3099                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
3100         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
3101 }
3102 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
3103
3104 static bool qeth_ipa_match_reply(struct qeth_cmd_buffer *iob,
3105                                  struct qeth_cmd_buffer *reply)
3106 {
3107         struct qeth_ipa_cmd *ipa_reply = __ipa_reply(reply);
3108
3109         return ipa_reply && (__ipa_cmd(iob)->hdr.seqno == ipa_reply->hdr.seqno);
3110 }
3111
3112 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
3113                                            enum qeth_ipa_cmds cmd_code,
3114                                            enum qeth_prot_versions prot,
3115                                            unsigned int data_length)
3116 {
3117         struct qeth_cmd_buffer *iob;
3118         struct qeth_ipacmd_hdr *hdr;
3119
3120         data_length += offsetof(struct qeth_ipa_cmd, data);
3121         iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
3122                              QETH_IPA_TIMEOUT);
3123         if (!iob)
3124                 return NULL;
3125
3126         qeth_prepare_ipa_cmd(card, iob, data_length, qeth_ipa_match_reply);
3127
3128         hdr = &__ipa_cmd(iob)->hdr;
3129         hdr->command = cmd_code;
3130         hdr->initiator = IPA_CMD_INITIATOR_HOST;
3131         /* hdr->seqno is set by qeth_send_control_data() */
3132         hdr->adapter_type = QETH_LINK_TYPE_FAST_ETH;
3133         hdr->rel_adapter_no = (u8) card->dev->dev_port;
3134         hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
3135         hdr->param_count = 1;
3136         hdr->prot_version = prot;
3137         return iob;
3138 }
3139 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
3140
3141 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
3142                                 struct qeth_reply *reply, unsigned long data)
3143 {
3144         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3145
3146         return (cmd->hdr.return_code) ? -EIO : 0;
3147 }
3148
3149 /**
3150  * qeth_send_ipa_cmd() - send an IPA command
3151  *
3152  * See qeth_send_control_data() for explanation of the arguments.
3153  */
3154
3155 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3156                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
3157                         unsigned long),
3158                 void *reply_param)
3159 {
3160         int rc;
3161
3162         QETH_CARD_TEXT(card, 4, "sendipa");
3163
3164         if (card->read_or_write_problem) {
3165                 qeth_put_cmd(iob);
3166                 return -EIO;
3167         }
3168
3169         if (reply_cb == NULL)
3170                 reply_cb = qeth_send_ipa_cmd_cb;
3171         rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
3172         if (rc == -ETIME) {
3173                 qeth_clear_ipacmd_list(card);
3174                 qeth_schedule_recovery(card);
3175         }
3176         return rc;
3177 }
3178 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
3179
3180 static int qeth_send_startlan_cb(struct qeth_card *card,
3181                                  struct qeth_reply *reply, unsigned long data)
3182 {
3183         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3184
3185         if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
3186                 return -ENETDOWN;
3187
3188         return (cmd->hdr.return_code) ? -EIO : 0;
3189 }
3190
3191 static int qeth_send_startlan(struct qeth_card *card)
3192 {
3193         struct qeth_cmd_buffer *iob;
3194
3195         QETH_CARD_TEXT(card, 2, "strtlan");
3196
3197         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
3198         if (!iob)
3199                 return -ENOMEM;
3200         return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
3201 }
3202
3203 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
3204 {
3205         if (!cmd->hdr.return_code)
3206                 cmd->hdr.return_code =
3207                         cmd->data.setadapterparms.hdr.return_code;
3208         return cmd->hdr.return_code;
3209 }
3210
3211 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
3212                 struct qeth_reply *reply, unsigned long data)
3213 {
3214         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3215         struct qeth_query_cmds_supp *query_cmd;
3216
3217         QETH_CARD_TEXT(card, 3, "quyadpcb");
3218         if (qeth_setadpparms_inspect_rc(cmd))
3219                 return -EIO;
3220
3221         query_cmd = &cmd->data.setadapterparms.data.query_cmds_supp;
3222         if (query_cmd->lan_type & 0x7f) {
3223                 if (!qeth_is_supported_link_type(card, query_cmd->lan_type))
3224                         return -EPROTONOSUPPORT;
3225
3226                 card->info.link_type = query_cmd->lan_type;
3227                 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
3228         }
3229
3230         card->options.adp.supported = query_cmd->supported_cmds;
3231         return 0;
3232 }
3233
3234 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3235                                                     enum qeth_ipa_setadp_cmd adp_cmd,
3236                                                     unsigned int data_length)
3237 {
3238         struct qeth_ipacmd_setadpparms_hdr *hdr;
3239         struct qeth_cmd_buffer *iob;
3240
3241         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
3242                                  data_length +
3243                                  offsetof(struct qeth_ipacmd_setadpparms,
3244                                           data));
3245         if (!iob)
3246                 return NULL;
3247
3248         hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
3249         hdr->cmdlength = sizeof(*hdr) + data_length;
3250         hdr->command_code = adp_cmd;
3251         hdr->used_total = 1;
3252         hdr->seq_no = 1;
3253         return iob;
3254 }
3255
3256 static int qeth_query_setadapterparms(struct qeth_card *card)
3257 {
3258         int rc;
3259         struct qeth_cmd_buffer *iob;
3260
3261         QETH_CARD_TEXT(card, 3, "queryadp");
3262         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3263                                    SETADP_DATA_SIZEOF(query_cmds_supp));
3264         if (!iob)
3265                 return -ENOMEM;
3266         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3267         return rc;
3268 }
3269
3270 static int qeth_query_ipassists_cb(struct qeth_card *card,
3271                 struct qeth_reply *reply, unsigned long data)
3272 {
3273         struct qeth_ipa_cmd *cmd;
3274
3275         QETH_CARD_TEXT(card, 2, "qipasscb");
3276
3277         cmd = (struct qeth_ipa_cmd *) data;
3278
3279         switch (cmd->hdr.return_code) {
3280         case IPA_RC_SUCCESS:
3281                 break;
3282         case IPA_RC_NOTSUPP:
3283         case IPA_RC_L2_UNSUPPORTED_CMD:
3284                 QETH_CARD_TEXT(card, 2, "ipaunsup");
3285                 card->options.ipa4.supported |= IPA_SETADAPTERPARMS;
3286                 card->options.ipa6.supported |= IPA_SETADAPTERPARMS;
3287                 return -EOPNOTSUPP;
3288         default:
3289                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
3290                                  CARD_DEVID(card), cmd->hdr.return_code);
3291                 return -EIO;
3292         }
3293
3294         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
3295                 card->options.ipa4 = cmd->hdr.assists;
3296         else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
3297                 card->options.ipa6 = cmd->hdr.assists;
3298         else
3299                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
3300                                  CARD_DEVID(card));
3301         return 0;
3302 }
3303
3304 static int qeth_query_ipassists(struct qeth_card *card,
3305                                 enum qeth_prot_versions prot)
3306 {
3307         int rc;
3308         struct qeth_cmd_buffer *iob;
3309
3310         QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
3311         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
3312         if (!iob)
3313                 return -ENOMEM;
3314         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3315         return rc;
3316 }
3317
3318 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3319                                 struct qeth_reply *reply, unsigned long data)
3320 {
3321         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3322         struct qeth_query_switch_attributes *attrs;
3323         struct qeth_switch_info *sw_info;
3324
3325         QETH_CARD_TEXT(card, 2, "qswiatcb");
3326         if (qeth_setadpparms_inspect_rc(cmd))
3327                 return -EIO;
3328
3329         sw_info = (struct qeth_switch_info *)reply->param;
3330         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3331         sw_info->capabilities = attrs->capabilities;
3332         sw_info->settings = attrs->settings;
3333         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3334                         sw_info->settings);
3335         return 0;
3336 }
3337
3338 int qeth_query_switch_attributes(struct qeth_card *card,
3339                                  struct qeth_switch_info *sw_info)
3340 {
3341         struct qeth_cmd_buffer *iob;
3342
3343         QETH_CARD_TEXT(card, 2, "qswiattr");
3344         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3345                 return -EOPNOTSUPP;
3346         if (!netif_carrier_ok(card->dev))
3347                 return -ENOMEDIUM;
3348         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
3349         if (!iob)
3350                 return -ENOMEM;
3351         return qeth_send_ipa_cmd(card, iob,
3352                                 qeth_query_switch_attributes_cb, sw_info);
3353 }
3354
3355 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
3356                                           enum qeth_diags_cmds sub_cmd,
3357                                           unsigned int data_length)
3358 {
3359         struct qeth_ipacmd_diagass *cmd;
3360         struct qeth_cmd_buffer *iob;
3361
3362         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
3363                                  DIAG_HDR_LEN + data_length);
3364         if (!iob)
3365                 return NULL;
3366
3367         cmd = &__ipa_cmd(iob)->data.diagass;
3368         cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
3369         cmd->subcmd = sub_cmd;
3370         return iob;
3371 }
3372 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
3373
3374 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3375                 struct qeth_reply *reply, unsigned long data)
3376 {
3377         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3378         u16 rc = cmd->hdr.return_code;
3379
3380         if (rc) {
3381                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3382                 return -EIO;
3383         }
3384
3385         card->info.diagass_support = cmd->data.diagass.ext;
3386         return 0;
3387 }
3388
3389 static int qeth_query_setdiagass(struct qeth_card *card)
3390 {
3391         struct qeth_cmd_buffer *iob;
3392
3393         QETH_CARD_TEXT(card, 2, "qdiagass");
3394         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
3395         if (!iob)
3396                 return -ENOMEM;
3397         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3398 }
3399
3400 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3401 {
3402         unsigned long info = get_zeroed_page(GFP_KERNEL);
3403         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3404         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3405         struct ccw_dev_id ccwid;
3406         int level;
3407
3408         tid->chpid = card->info.chpid;
3409         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3410         tid->ssid = ccwid.ssid;
3411         tid->devno = ccwid.devno;
3412         if (!info)
3413                 return;
3414         level = stsi(NULL, 0, 0, 0);
3415         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3416                 tid->lparnr = info222->lpar_number;
3417         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3418                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3419                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3420         }
3421         free_page(info);
3422 }
3423
3424 static int qeth_hw_trap_cb(struct qeth_card *card,
3425                 struct qeth_reply *reply, unsigned long data)
3426 {
3427         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3428         u16 rc = cmd->hdr.return_code;
3429
3430         if (rc) {
3431                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3432                 return -EIO;
3433         }
3434         return 0;
3435 }
3436
3437 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3438 {
3439         struct qeth_cmd_buffer *iob;
3440         struct qeth_ipa_cmd *cmd;
3441
3442         QETH_CARD_TEXT(card, 2, "diagtrap");
3443         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
3444         if (!iob)
3445                 return -ENOMEM;
3446         cmd = __ipa_cmd(iob);
3447         cmd->data.diagass.type = 1;
3448         cmd->data.diagass.action = action;
3449         switch (action) {
3450         case QETH_DIAGS_TRAP_ARM:
3451                 cmd->data.diagass.options = 0x0003;
3452                 cmd->data.diagass.ext = 0x00010000 +
3453                         sizeof(struct qeth_trap_id);
3454                 qeth_get_trap_id(card,
3455                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3456                 break;
3457         case QETH_DIAGS_TRAP_DISARM:
3458                 cmd->data.diagass.options = 0x0001;
3459                 break;
3460         case QETH_DIAGS_TRAP_CAPTURE:
3461                 break;
3462         }
3463         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3464 }
3465
3466 static int qeth_check_qdio_errors(struct qeth_card *card,
3467                                   struct qdio_buffer *buf,
3468                                   unsigned int qdio_error,
3469                                   const char *dbftext)
3470 {
3471         if (qdio_error) {
3472                 QETH_CARD_TEXT(card, 2, dbftext);
3473                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3474                                buf->element[15].sflags);
3475                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3476                                buf->element[14].sflags);
3477                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3478                 if ((buf->element[15].sflags) == 0x12) {
3479                         QETH_CARD_STAT_INC(card, rx_fifo_errors);
3480                         return 0;
3481                 } else
3482                         return 1;
3483         }
3484         return 0;
3485 }
3486
3487 static unsigned int qeth_rx_refill_queue(struct qeth_card *card,
3488                                          unsigned int count)
3489 {
3490         struct qeth_qdio_q *queue = card->qdio.in_q;
3491         struct list_head *lh;
3492         int i;
3493         int rc;
3494         int newcount = 0;
3495
3496         /* only requeue at a certain threshold to avoid SIGAs */
3497         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3498                 for (i = queue->next_buf_to_init;
3499                      i < queue->next_buf_to_init + count; ++i) {
3500                         if (qeth_init_input_buffer(card,
3501                                 &queue->bufs[QDIO_BUFNR(i)])) {
3502                                 break;
3503                         } else {
3504                                 newcount++;
3505                         }
3506                 }
3507
3508                 if (newcount < count) {
3509                         /* we are in memory shortage so we switch back to
3510                            traditional skb allocation and drop packages */
3511                         atomic_set(&card->force_alloc_skb, 3);
3512                         count = newcount;
3513                 } else {
3514                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3515                 }
3516
3517                 if (!count) {
3518                         i = 0;
3519                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3520                                 i++;
3521                         if (i == card->qdio.in_buf_pool.buf_count) {
3522                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3523                                 schedule_delayed_work(
3524                                         &card->buffer_reclaim_work,
3525                                         QETH_RECLAIM_WORK_TIME);
3526                         }
3527                         return 0;
3528                 }
3529
3530                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3531                              queue->next_buf_to_init, count);
3532                 if (rc) {
3533                         QETH_CARD_TEXT(card, 2, "qinberr");
3534                 }
3535                 queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init +
3536                                                      count);
3537                 return count;
3538         }
3539
3540         return 0;
3541 }
3542
3543 static void qeth_buffer_reclaim_work(struct work_struct *work)
3544 {
3545         struct qeth_card *card = container_of(to_delayed_work(work),
3546                                               struct qeth_card,
3547                                               buffer_reclaim_work);
3548
3549         local_bh_disable();
3550         napi_schedule(&card->napi);
3551         /* kick-start the NAPI softirq: */
3552         local_bh_enable();
3553 }
3554
3555 static void qeth_handle_send_error(struct qeth_card *card,
3556                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3557 {
3558         int sbalf15 = buffer->buffer->element[15].sflags;
3559
3560         QETH_CARD_TEXT(card, 6, "hdsnderr");
3561         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3562
3563         if (!qdio_err)
3564                 return;
3565
3566         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3567                 return;
3568
3569         QETH_CARD_TEXT(card, 1, "lnkfail");
3570         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3571                        (u16)qdio_err, (u8)sbalf15);
3572 }
3573
3574 /**
3575  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3576  * @queue: queue to check for packing buffer
3577  *
3578  * Returns number of buffers that were prepared for flush.
3579  */
3580 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3581 {
3582         struct qeth_qdio_out_buffer *buffer;
3583
3584         buffer = queue->bufs[queue->next_buf_to_fill];
3585         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3586             (buffer->next_element_to_fill > 0)) {
3587                 /* it's a packing buffer */
3588                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3589                 queue->next_buf_to_fill =
3590                         QDIO_BUFNR(queue->next_buf_to_fill + 1);
3591                 return 1;
3592         }
3593         return 0;
3594 }
3595
3596 /*
3597  * Switched to packing state if the number of used buffers on a queue
3598  * reaches a certain limit.
3599  */
3600 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3601 {
3602         if (!queue->do_pack) {
3603                 if (atomic_read(&queue->used_buffers)
3604                     >= QETH_HIGH_WATERMARK_PACK){
3605                         /* switch non-PACKING -> PACKING */
3606                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3607                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3608                         queue->do_pack = 1;
3609                 }
3610         }
3611 }
3612
3613 /*
3614  * Switches from packing to non-packing mode. If there is a packing
3615  * buffer on the queue this buffer will be prepared to be flushed.
3616  * In that case 1 is returned to inform the caller. If no buffer
3617  * has to be flushed, zero is returned.
3618  */
3619 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3620 {
3621         if (queue->do_pack) {
3622                 if (atomic_read(&queue->used_buffers)
3623                     <= QETH_LOW_WATERMARK_PACK) {
3624                         /* switch PACKING -> non-PACKING */
3625                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3626                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3627                         queue->do_pack = 0;
3628                         return qeth_prep_flush_pack_buffer(queue);
3629                 }
3630         }
3631         return 0;
3632 }
3633
3634 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3635                                int count)
3636 {
3637         struct qeth_qdio_out_buffer *buf = queue->bufs[index];
3638         unsigned int qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3639         struct qeth_card *card = queue->card;
3640         int rc;
3641         int i;
3642
3643         for (i = index; i < index + count; ++i) {
3644                 unsigned int bidx = QDIO_BUFNR(i);
3645                 struct sk_buff *skb;
3646
3647                 buf = queue->bufs[bidx];
3648                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3649                                 SBAL_EFLAGS_LAST_ENTRY;
3650                 queue->coalesced_frames += buf->frames;
3651
3652                 if (queue->bufstates)
3653                         queue->bufstates[bidx].user = buf;
3654
3655                 if (IS_IQD(card)) {
3656                         skb_queue_walk(&buf->skb_list, skb)
3657                                 skb_tx_timestamp(skb);
3658                 }
3659         }
3660
3661         if (!IS_IQD(card)) {
3662                 if (!queue->do_pack) {
3663                         if ((atomic_read(&queue->used_buffers) >=
3664                                 (QETH_HIGH_WATERMARK_PACK -
3665                                  QETH_WATERMARK_PACK_FUZZ)) &&
3666                             !atomic_read(&queue->set_pci_flags_count)) {
3667                                 /* it's likely that we'll go to packing
3668                                  * mode soon */
3669                                 atomic_inc(&queue->set_pci_flags_count);
3670                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3671                         }
3672                 } else {
3673                         if (!atomic_read(&queue->set_pci_flags_count)) {
3674                                 /*
3675                                  * there's no outstanding PCI any more, so we
3676                                  * have to request a PCI to be sure the the PCI
3677                                  * will wake at some time in the future then we
3678                                  * can flush packed buffers that might still be
3679                                  * hanging around, which can happen if no
3680                                  * further send was requested by the stack
3681                                  */
3682                                 atomic_inc(&queue->set_pci_flags_count);
3683                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3684                         }
3685                 }
3686
3687                 if (atomic_read(&queue->set_pci_flags_count))
3688                         qdio_flags |= QDIO_FLAG_PCI_OUT;
3689         }
3690
3691         QETH_TXQ_STAT_INC(queue, doorbell);
3692         rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3693                      queue->queue_no, index, count);
3694
3695         /* Fake the TX completion interrupt: */
3696         if (IS_IQD(card)) {
3697                 unsigned int frames = READ_ONCE(queue->max_coalesced_frames);
3698                 unsigned int usecs = READ_ONCE(queue->coalesce_usecs);
3699
3700                 if (frames && queue->coalesced_frames >= frames) {
3701                         napi_schedule(&queue->napi);
3702                         queue->coalesced_frames = 0;
3703                         QETH_TXQ_STAT_INC(queue, coal_frames);
3704                 } else if (usecs) {
3705                         qeth_tx_arm_timer(queue, usecs);
3706                 }
3707         }
3708
3709         if (rc) {
3710                 /* ignore temporary SIGA errors without busy condition */
3711                 if (rc == -ENOBUFS)
3712                         return;
3713                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3714                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3715                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3716                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3717                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3718
3719                 /* this must not happen under normal circumstances. if it
3720                  * happens something is really wrong -> recover */
3721                 qeth_schedule_recovery(queue->card);
3722                 return;
3723         }
3724 }
3725
3726 static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
3727 {
3728         qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count);
3729
3730         queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count);
3731         queue->prev_hdr = NULL;
3732         queue->bulk_count = 0;
3733 }
3734
3735 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3736 {
3737         /*
3738          * check if weed have to switch to non-packing mode or if
3739          * we have to get a pci flag out on the queue
3740          */
3741         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3742             !atomic_read(&queue->set_pci_flags_count)) {
3743                 unsigned int index, flush_cnt;
3744                 bool q_was_packing;
3745
3746                 spin_lock(&queue->lock);
3747
3748                 index = queue->next_buf_to_fill;
3749                 q_was_packing = queue->do_pack;
3750
3751                 flush_cnt = qeth_switch_to_nonpacking_if_needed(queue);
3752                 if (!flush_cnt && !atomic_read(&queue->set_pci_flags_count))
3753                         flush_cnt = qeth_prep_flush_pack_buffer(queue);
3754
3755                 if (flush_cnt) {
3756                         qeth_flush_buffers(queue, index, flush_cnt);
3757                         if (q_was_packing)
3758                                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3759                 }
3760
3761                 spin_unlock(&queue->lock);
3762         }
3763 }
3764
3765 static void qeth_qdio_poll(struct ccw_device *cdev, unsigned long card_ptr)
3766 {
3767         struct qeth_card *card = (struct qeth_card *)card_ptr;
3768
3769         napi_schedule_irqoff(&card->napi);
3770 }
3771
3772 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3773 {
3774         int rc;
3775
3776         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3777                 rc = -1;
3778                 goto out;
3779         } else {
3780                 if (card->options.cq == cq) {
3781                         rc = 0;
3782                         goto out;
3783                 }
3784
3785                 qeth_free_qdio_queues(card);
3786                 card->options.cq = cq;
3787                 rc = 0;
3788         }
3789 out:
3790         return rc;
3791
3792 }
3793 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3794
3795 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3796                                  unsigned int queue, int first_element,
3797                                  int count)
3798 {
3799         struct qeth_qdio_q *cq = card->qdio.c_q;
3800         int i;
3801         int rc;
3802
3803         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3804         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3805         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3806
3807         if (qdio_err) {
3808                 netif_tx_stop_all_queues(card->dev);
3809                 qeth_schedule_recovery(card);
3810                 return;
3811         }
3812
3813         for (i = first_element; i < first_element + count; ++i) {
3814                 struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)];
3815                 int e = 0;
3816
3817                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3818                        buffer->element[e].addr) {
3819                         unsigned long phys_aob_addr = buffer->element[e].addr;
3820
3821                         qeth_qdio_handle_aob(card, phys_aob_addr);
3822                         ++e;
3823                 }
3824                 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3825         }
3826         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3827                     card->qdio.c_q->next_buf_to_init,
3828                     count);
3829         if (rc) {
3830                 dev_warn(&card->gdev->dev,
3831                         "QDIO reported an error, rc=%i\n", rc);
3832                 QETH_CARD_TEXT(card, 2, "qcqherr");
3833         }
3834
3835         cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count);
3836 }
3837
3838 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3839                                     unsigned int qdio_err, int queue,
3840                                     int first_elem, int count,
3841                                     unsigned long card_ptr)
3842 {
3843         struct qeth_card *card = (struct qeth_card *)card_ptr;
3844
3845         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3846         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3847
3848         if (qdio_err)
3849                 qeth_schedule_recovery(card);
3850 }
3851
3852 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3853                                      unsigned int qdio_error, int __queue,
3854                                      int first_element, int count,
3855                                      unsigned long card_ptr)
3856 {
3857         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3858         struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3859         struct net_device *dev = card->dev;
3860         struct netdev_queue *txq;
3861         int i;
3862
3863         QETH_CARD_TEXT(card, 6, "qdouhdl");
3864         if (qdio_error & QDIO_ERROR_FATAL) {
3865                 QETH_CARD_TEXT(card, 2, "achkcond");
3866                 netif_tx_stop_all_queues(dev);
3867                 qeth_schedule_recovery(card);
3868                 return;
3869         }
3870
3871         for (i = first_element; i < (first_element + count); ++i) {
3872                 struct qeth_qdio_out_buffer *buf = queue->bufs[QDIO_BUFNR(i)];
3873
3874                 qeth_handle_send_error(card, buf, qdio_error);
3875                 qeth_clear_output_buffer(queue, buf, qdio_error, 0);
3876         }
3877
3878         atomic_sub(count, &queue->used_buffers);
3879         qeth_check_outbound_queue(queue);
3880
3881         txq = netdev_get_tx_queue(dev, __queue);
3882         /* xmit may have observed the full-condition, but not yet stopped the
3883          * txq. In which case the code below won't trigger. So before returning,
3884          * xmit will re-check the txq's fill level and wake it up if needed.
3885          */
3886         if (netif_tx_queue_stopped(txq) && !qeth_out_queue_is_full(queue))
3887                 netif_tx_wake_queue(txq);
3888 }
3889
3890 /**
3891  * Note: Function assumes that we have 4 outbound queues.
3892  */
3893 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3894 {
3895         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3896         u8 tos;
3897
3898         switch (card->qdio.do_prio_queueing) {
3899         case QETH_PRIO_Q_ING_TOS:
3900         case QETH_PRIO_Q_ING_PREC:
3901                 switch (qeth_get_ip_version(skb)) {
3902                 case 4:
3903                         tos = ipv4_get_dsfield(ip_hdr(skb));
3904                         break;
3905                 case 6:
3906                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3907                         break;
3908                 default:
3909                         return card->qdio.default_out_queue;
3910                 }
3911                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3912                         return ~tos >> 6 & 3;
3913                 if (tos & IPTOS_MINCOST)
3914                         return 3;
3915                 if (tos & IPTOS_RELIABILITY)
3916                         return 2;
3917                 if (tos & IPTOS_THROUGHPUT)
3918                         return 1;
3919                 if (tos & IPTOS_LOWDELAY)
3920                         return 0;
3921                 break;
3922         case QETH_PRIO_Q_ING_SKB:
3923                 if (skb->priority > 5)
3924                         return 0;
3925                 return ~skb->priority >> 1 & 3;
3926         case QETH_PRIO_Q_ING_VLAN:
3927                 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3928                         return ~ntohs(veth->h_vlan_TCI) >>
3929                                (VLAN_PRIO_SHIFT + 1) & 3;
3930                 break;
3931         case QETH_PRIO_Q_ING_FIXED:
3932                 return card->qdio.default_out_queue;
3933         default:
3934                 break;
3935         }
3936         return card->qdio.default_out_queue;
3937 }
3938 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3939
3940 /**
3941  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3942  * @skb:                                SKB address
3943  *
3944  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3945  * fragmented part of the SKB. Returns zero for linear SKB.
3946  */
3947 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3948 {
3949         int cnt, elements = 0;
3950
3951         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3952                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3953
3954                 elements += qeth_get_elements_for_range(
3955                         (addr_t)skb_frag_address(frag),
3956                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3957         }
3958         return elements;
3959 }
3960
3961 /**
3962  * qeth_count_elements() -      Counts the number of QDIO buffer elements needed
3963  *                              to transmit an skb.
3964  * @skb:                        the skb to operate on.
3965  * @data_offset:                skip this part of the skb's linear data
3966  *
3967  * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3968  * skb's data (both its linear part and paged fragments).
3969  */
3970 unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset)
3971 {
3972         unsigned int elements = qeth_get_elements_for_frags(skb);
3973         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3974         addr_t start = (addr_t)skb->data + data_offset;
3975
3976         if (start != end)
3977                 elements += qeth_get_elements_for_range(start, end);
3978         return elements;
3979 }
3980 EXPORT_SYMBOL_GPL(qeth_count_elements);
3981
3982 #define QETH_HDR_CACHE_OBJ_SIZE         (sizeof(struct qeth_hdr_tso) + \
3983                                          MAX_TCP_HEADER)
3984
3985 /**
3986  * qeth_add_hw_header() - add a HW header to an skb.
3987  * @skb: skb that the HW header should be added to.
3988  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3989  *       it contains a valid pointer to a qeth_hdr.
3990  * @hdr_len: length of the HW header.
3991  * @proto_len: length of protocol headers that need to be in same page as the
3992  *             HW header.
3993  *
3994  * Returns the pushed length. If the header can't be pushed on
3995  * (eg. because it would cross a page boundary), it is allocated from
3996  * the cache instead and 0 is returned.
3997  * The number of needed buffer elements is returned in @elements.
3998  * Error to create the hdr is indicated by returning with < 0.
3999  */
4000 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
4001                               struct sk_buff *skb, struct qeth_hdr **hdr,
4002                               unsigned int hdr_len, unsigned int proto_len,
4003                               unsigned int *elements)
4004 {
4005         gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
4006         const unsigned int contiguous = proto_len ? proto_len : 1;
4007         const unsigned int max_elements = queue->max_elements;
4008         unsigned int __elements;
4009         addr_t start, end;
4010         bool push_ok;
4011         int rc;
4012
4013 check_layout:
4014         start = (addr_t)skb->data - hdr_len;
4015         end = (addr_t)skb->data;
4016
4017         if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
4018                 /* Push HW header into same page as first protocol header. */
4019                 push_ok = true;
4020                 /* ... but TSO always needs a separate element for headers: */
4021                 if (skb_is_gso(skb))
4022                         __elements = 1 + qeth_count_elements(skb, proto_len);
4023                 else
4024                         __elements = qeth_count_elements(skb, 0);
4025         } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
4026                 /* Push HW header into preceding page, flush with skb->data. */
4027                 push_ok = true;
4028                 __elements = 1 + qeth_count_elements(skb, 0);
4029         } else {
4030                 /* Use header cache, copy protocol headers up. */
4031                 push_ok = false;
4032                 __elements = 1 + qeth_count_elements(skb, proto_len);
4033         }
4034
4035         /* Compress skb to fit into one IO buffer: */
4036         if (__elements > max_elements) {
4037                 if (!skb_is_nonlinear(skb)) {
4038                         /* Drop it, no easy way of shrinking it further. */
4039                         QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
4040                                          max_elements, __elements, skb->len);
4041                         return -E2BIG;
4042                 }
4043
4044                 rc = skb_linearize(skb);
4045                 if (rc) {
4046                         QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
4047                         return rc;
4048                 }
4049
4050                 QETH_TXQ_STAT_INC(queue, skbs_linearized);
4051                 /* Linearization changed the layout, re-evaluate: */
4052                 goto check_layout;
4053         }
4054
4055         *elements = __elements;
4056         /* Add the header: */
4057         if (push_ok) {
4058                 *hdr = skb_push(skb, hdr_len);
4059                 return hdr_len;
4060         }
4061
4062         /* Fall back to cache element with known-good alignment: */
4063         if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
4064                 return -E2BIG;
4065         *hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
4066         if (!*hdr)
4067                 return -ENOMEM;
4068         /* Copy protocol headers behind HW header: */
4069         skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
4070         return 0;
4071 }
4072
4073 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
4074                               struct sk_buff *curr_skb,
4075                               struct qeth_hdr *curr_hdr)
4076 {
4077         struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
4078         struct qeth_hdr *prev_hdr = queue->prev_hdr;
4079
4080         if (!prev_hdr)
4081                 return true;
4082
4083         /* All packets must have the same target: */
4084         if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
4085                 struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);
4086
4087                 return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
4088                                         eth_hdr(curr_skb)->h_dest) &&
4089                        qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
4090         }
4091
4092         return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
4093                qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
4094 }
4095
4096 /**
4097  * qeth_fill_buffer() - map skb into an output buffer
4098  * @buf:        buffer to transport the skb
4099  * @skb:        skb to map into the buffer
4100  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
4101  *              from qeth_core_header_cache.
4102  * @offset:     when mapping the skb, start at skb->data + offset
4103  * @hd_len:     if > 0, build a dedicated header element of this size
4104  */
4105 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
4106                                      struct sk_buff *skb, struct qeth_hdr *hdr,
4107                                      unsigned int offset, unsigned int hd_len)
4108 {
4109         struct qdio_buffer *buffer = buf->buffer;
4110         int element = buf->next_element_to_fill;
4111         int length = skb_headlen(skb) - offset;
4112         char *data = skb->data + offset;
4113         unsigned int elem_length, cnt;
4114         bool is_first_elem = true;
4115
4116         __skb_queue_tail(&buf->skb_list, skb);
4117
4118         /* build dedicated element for HW Header */
4119         if (hd_len) {
4120                 is_first_elem = false;
4121
4122                 buffer->element[element].addr = virt_to_phys(hdr);
4123                 buffer->element[element].length = hd_len;
4124                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4125
4126                 /* HW header is allocated from cache: */
4127                 if ((void *)hdr != skb->data)
4128                         buf->is_header[element] = 1;
4129                 /* HW header was pushed and is contiguous with linear part: */
4130                 else if (length > 0 && !PAGE_ALIGNED(data) &&
4131                          (data == (char *)hdr + hd_len))
4132                         buffer->element[element].eflags |=
4133                                 SBAL_EFLAGS_CONTIGUOUS;
4134
4135                 element++;
4136         }
4137
4138         /* map linear part into buffer element(s) */
4139         while (length > 0) {
4140                 elem_length = min_t(unsigned int, length,
4141                                     PAGE_SIZE - offset_in_page(data));
4142
4143                 buffer->element[element].addr = virt_to_phys(data);
4144                 buffer->element[element].length = elem_length;
4145                 length -= elem_length;
4146                 if (is_first_elem) {
4147                         is_first_elem = false;
4148                         if (length || skb_is_nonlinear(skb))
4149                                 /* skb needs additional elements */
4150                                 buffer->element[element].eflags =
4151                                         SBAL_EFLAGS_FIRST_FRAG;
4152                         else
4153                                 buffer->element[element].eflags = 0;
4154                 } else {
4155                         buffer->element[element].eflags =
4156                                 SBAL_EFLAGS_MIDDLE_FRAG;
4157                 }
4158
4159                 data += elem_length;
4160                 element++;
4161         }
4162
4163         /* map page frags into buffer element(s) */
4164         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
4165                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
4166
4167                 data = skb_frag_address(frag);
4168                 length = skb_frag_size(frag);
4169                 while (length > 0) {
4170                         elem_length = min_t(unsigned int, length,
4171                                             PAGE_SIZE - offset_in_page(data));
4172
4173                         buffer->element[element].addr = virt_to_phys(data);
4174                         buffer->element[element].length = elem_length;
4175                         buffer->element[element].eflags =
4176                                 SBAL_EFLAGS_MIDDLE_FRAG;
4177
4178                         length -= elem_length;
4179                         data += elem_length;
4180                         element++;
4181                 }
4182         }
4183
4184         if (buffer->element[element - 1].eflags)
4185                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
4186         buf->next_element_to_fill = element;
4187         return element;
4188 }
4189
4190 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4191                        struct sk_buff *skb, unsigned int elements,
4192                        struct qeth_hdr *hdr, unsigned int offset,
4193                        unsigned int hd_len)
4194 {
4195         unsigned int bytes = qdisc_pkt_len(skb);
4196         struct qeth_qdio_out_buffer *buffer;
4197         unsigned int next_element;
4198         struct netdev_queue *txq;
4199         bool stopped = false;
4200         bool flush;
4201
4202         buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)];
4203         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4204
4205         /* Just a sanity check, the wake/stop logic should ensure that we always
4206          * get a free buffer.
4207          */
4208         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4209                 return -EBUSY;
4210
4211         flush = !qeth_iqd_may_bulk(queue, skb, hdr);
4212
4213         if (flush ||
4214             (buffer->next_element_to_fill + elements > queue->max_elements)) {
4215                 if (buffer->next_element_to_fill > 0) {
4216                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4217                         queue->bulk_count++;
4218                 }
4219
4220                 if (queue->bulk_count >= queue->bulk_max)
4221                         flush = true;
4222
4223                 if (flush)
4224                         qeth_flush_queue(queue);
4225
4226                 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start +
4227                                                 queue->bulk_count)];
4228
4229                 /* Sanity-check again: */
4230                 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4231                         return -EBUSY;
4232         }
4233
4234         if (buffer->next_element_to_fill == 0 &&
4235             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4236                 /* If a TX completion happens right _here_ and misses to wake
4237                  * the txq, then our re-check below will catch the race.
4238                  */
4239                 QETH_TXQ_STAT_INC(queue, stopped);
4240                 netif_tx_stop_queue(txq);
4241                 stopped = true;
4242         }
4243
4244         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4245         buffer->bytes += bytes;
4246         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4247         queue->prev_hdr = hdr;
4248
4249         flush = __netdev_tx_sent_queue(txq, bytes,
4250                                        !stopped && netdev_xmit_more());
4251
4252         if (flush || next_element >= queue->max_elements) {
4253                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4254                 queue->bulk_count++;
4255
4256                 if (queue->bulk_count >= queue->bulk_max)
4257                         flush = true;
4258
4259                 if (flush)
4260                         qeth_flush_queue(queue);
4261         }
4262
4263         if (stopped && !qeth_out_queue_is_full(queue))
4264                 netif_tx_start_queue(txq);
4265         return 0;
4266 }
4267
4268 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4269                         struct sk_buff *skb, struct qeth_hdr *hdr,
4270                         unsigned int offset, unsigned int hd_len,
4271                         int elements_needed)
4272 {
4273         unsigned int start_index = queue->next_buf_to_fill;
4274         struct qeth_qdio_out_buffer *buffer;
4275         unsigned int next_element;
4276         struct netdev_queue *txq;
4277         bool stopped = false;
4278         int flush_count = 0;
4279         int do_pack = 0;
4280         int rc = 0;
4281
4282         buffer = queue->bufs[queue->next_buf_to_fill];
4283
4284         /* Just a sanity check, the wake/stop logic should ensure that we always
4285          * get a free buffer.
4286          */
4287         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4288                 return -EBUSY;
4289
4290         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4291
4292         /* check if we need to switch packing state of this queue */
4293         qeth_switch_to_packing_if_needed(queue);
4294         if (queue->do_pack) {
4295                 do_pack = 1;
4296                 /* does packet fit in current buffer? */
4297                 if (buffer->next_element_to_fill + elements_needed >
4298                     queue->max_elements) {
4299                         /* ... no -> set state PRIMED */
4300                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4301                         flush_count++;
4302                         queue->next_buf_to_fill =
4303                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4304                         buffer = queue->bufs[queue->next_buf_to_fill];
4305
4306                         /* We stepped forward, so sanity-check again: */
4307                         if (atomic_read(&buffer->state) !=
4308                             QETH_QDIO_BUF_EMPTY) {
4309                                 qeth_flush_buffers(queue, start_index,
4310                                                            flush_count);
4311                                 rc = -EBUSY;
4312                                 goto out;
4313                         }
4314                 }
4315         }
4316
4317         if (buffer->next_element_to_fill == 0 &&
4318             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4319                 /* If a TX completion happens right _here_ and misses to wake
4320                  * the txq, then our re-check below will catch the race.
4321                  */
4322                 QETH_TXQ_STAT_INC(queue, stopped);
4323                 netif_tx_stop_queue(txq);
4324                 stopped = true;
4325         }
4326
4327         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4328         buffer->bytes += qdisc_pkt_len(skb);
4329         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4330
4331         if (queue->do_pack)
4332                 QETH_TXQ_STAT_INC(queue, skbs_pack);
4333         if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
4334                 flush_count++;
4335                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4336                 queue->next_buf_to_fill =
4337                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4338         }
4339
4340         if (flush_count)
4341                 qeth_flush_buffers(queue, start_index, flush_count);
4342
4343 out:
4344         if (do_pack)
4345                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
4346
4347         if (stopped && !qeth_out_queue_is_full(queue))
4348                 netif_tx_start_queue(txq);
4349         return rc;
4350 }
4351 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
4352
4353 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
4354                               unsigned int payload_len, struct sk_buff *skb,
4355                               unsigned int proto_len)
4356 {
4357         struct qeth_hdr_ext_tso *ext = &hdr->ext;
4358
4359         ext->hdr_tot_len = sizeof(*ext);
4360         ext->imb_hdr_no = 1;
4361         ext->hdr_type = 1;
4362         ext->hdr_version = 1;
4363         ext->hdr_len = 28;
4364         ext->payload_len = payload_len;
4365         ext->mss = skb_shinfo(skb)->gso_size;
4366         ext->dg_hdr_len = proto_len;
4367 }
4368
4369 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4370               struct qeth_qdio_out_q *queue, int ipv,
4371               void (*fill_header)(struct qeth_qdio_out_q *queue,
4372                                   struct qeth_hdr *hdr, struct sk_buff *skb,
4373                                   int ipv, unsigned int data_len))
4374 {
4375         unsigned int proto_len, hw_hdr_len;
4376         unsigned int frame_len = skb->len;
4377         bool is_tso = skb_is_gso(skb);
4378         unsigned int data_offset = 0;
4379         struct qeth_hdr *hdr = NULL;
4380         unsigned int hd_len = 0;
4381         unsigned int elements;
4382         int push_len, rc;
4383
4384         if (is_tso) {
4385                 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4386                 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4387         } else {
4388                 hw_hdr_len = sizeof(struct qeth_hdr);
4389                 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4390         }
4391
4392         rc = skb_cow_head(skb, hw_hdr_len);
4393         if (rc)
4394                 return rc;
4395
4396         push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4397                                       &elements);
4398         if (push_len < 0)
4399                 return push_len;
4400         if (is_tso || !push_len) {
4401                 /* HW header needs its own buffer element. */
4402                 hd_len = hw_hdr_len + proto_len;
4403                 data_offset = push_len + proto_len;
4404         }
4405         memset(hdr, 0, hw_hdr_len);
4406         fill_header(queue, hdr, skb, ipv, frame_len);
4407         if (is_tso)
4408                 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4409                                   frame_len - proto_len, skb, proto_len);
4410
4411         if (IS_IQD(card)) {
4412                 rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
4413                                  hd_len);
4414         } else {
4415                 /* TODO: drop skb_orphan() once TX completion is fast enough */
4416                 skb_orphan(skb);
4417                 spin_lock(&queue->lock);
4418                 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4419                                          hd_len, elements);
4420                 spin_unlock(&queue->lock);
4421         }
4422
4423         if (rc && !push_len)
4424                 kmem_cache_free(qeth_core_header_cache, hdr);
4425
4426         return rc;
4427 }
4428 EXPORT_SYMBOL_GPL(qeth_xmit);
4429
4430 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4431                 struct qeth_reply *reply, unsigned long data)
4432 {
4433         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4434         struct qeth_ipacmd_setadpparms *setparms;
4435
4436         QETH_CARD_TEXT(card, 4, "prmadpcb");
4437
4438         setparms = &(cmd->data.setadapterparms);
4439         if (qeth_setadpparms_inspect_rc(cmd)) {
4440                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4441                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4442         }
4443         card->info.promisc_mode = setparms->data.mode;
4444         return (cmd->hdr.return_code) ? -EIO : 0;
4445 }
4446
4447 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
4448 {
4449         enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
4450                                                     SET_PROMISC_MODE_OFF;
4451         struct qeth_cmd_buffer *iob;
4452         struct qeth_ipa_cmd *cmd;
4453
4454         QETH_CARD_TEXT(card, 4, "setprom");
4455         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4456
4457         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4458                                    SETADP_DATA_SIZEOF(mode));
4459         if (!iob)
4460                 return;
4461         cmd = __ipa_cmd(iob);
4462         cmd->data.setadapterparms.data.mode = mode;
4463         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4464 }
4465 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4466
4467 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4468                 struct qeth_reply *reply, unsigned long data)
4469 {
4470         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4471         struct qeth_ipacmd_setadpparms *adp_cmd;
4472
4473         QETH_CARD_TEXT(card, 4, "chgmaccb");
4474         if (qeth_setadpparms_inspect_rc(cmd))
4475                 return -EIO;
4476
4477         adp_cmd = &cmd->data.setadapterparms;
4478         if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4479                 return -EADDRNOTAVAIL;
4480
4481         if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4482             !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4483                 return -EADDRNOTAVAIL;
4484
4485         ether_addr_copy(card->dev->dev_addr, adp_cmd->data.change_addr.addr);
4486         return 0;
4487 }
4488
4489 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4490 {
4491         int rc;
4492         struct qeth_cmd_buffer *iob;
4493         struct qeth_ipa_cmd *cmd;
4494
4495         QETH_CARD_TEXT(card, 4, "chgmac");
4496
4497         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4498                                    SETADP_DATA_SIZEOF(change_addr));
4499         if (!iob)
4500                 return -ENOMEM;
4501         cmd = __ipa_cmd(iob);
4502         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4503         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4504         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4505                         card->dev->dev_addr);
4506         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4507                                NULL);
4508         return rc;
4509 }
4510 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4511
4512 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4513                 struct qeth_reply *reply, unsigned long data)
4514 {
4515         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4516         struct qeth_set_access_ctrl *access_ctrl_req;
4517
4518         QETH_CARD_TEXT(card, 4, "setaccb");
4519
4520         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4521         QETH_CARD_TEXT_(card, 2, "rc=%d",
4522                         cmd->data.setadapterparms.hdr.return_code);
4523         if (cmd->data.setadapterparms.hdr.return_code !=
4524                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4525                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4526                                  access_ctrl_req->subcmd_code, CARD_DEVID(card),
4527                                  cmd->data.setadapterparms.hdr.return_code);
4528         switch (qeth_setadpparms_inspect_rc(cmd)) {
4529         case SET_ACCESS_CTRL_RC_SUCCESS:
4530                 if (access_ctrl_req->subcmd_code == ISOLATION_MODE_NONE)
4531                         dev_info(&card->gdev->dev,
4532                             "QDIO data connection isolation is deactivated\n");
4533                 else
4534                         dev_info(&card->gdev->dev,
4535                             "QDIO data connection isolation is activated\n");
4536                 return 0;
4537         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4538                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4539                                  CARD_DEVID(card));
4540                 return 0;
4541         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4542                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4543                                  CARD_DEVID(card));
4544                 return 0;
4545         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4546                 dev_err(&card->gdev->dev, "Adapter does not "
4547                         "support QDIO data connection isolation\n");
4548                 return -EOPNOTSUPP;
4549         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4550                 dev_err(&card->gdev->dev,
4551                         "Adapter is dedicated. "
4552                         "QDIO data connection isolation not supported\n");
4553                 return -EOPNOTSUPP;
4554         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4555                 dev_err(&card->gdev->dev,
4556                         "TSO does not permit QDIO data connection isolation\n");
4557                 return -EPERM;
4558         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4559                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4560                         "support reflective relay mode\n");
4561                 return -EOPNOTSUPP;
4562         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4563                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4564                                         "enabled at the adjacent switch port");
4565                 return -EREMOTEIO;
4566         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4567                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4568                                         "at the adjacent switch failed\n");
4569                 /* benign error while disabling ISOLATION_MODE_FWD */
4570                 return 0;
4571         default:
4572                 return -EIO;
4573         }
4574 }
4575
4576 int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4577                                      enum qeth_ipa_isolation_modes mode)
4578 {
4579         int rc;
4580         struct qeth_cmd_buffer *iob;
4581         struct qeth_ipa_cmd *cmd;
4582         struct qeth_set_access_ctrl *access_ctrl_req;
4583
4584         QETH_CARD_TEXT(card, 4, "setacctl");
4585
4586         if (!qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4587                 dev_err(&card->gdev->dev,
4588                         "Adapter does not support QDIO data connection isolation\n");
4589                 return -EOPNOTSUPP;
4590         }
4591
4592         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4593                                    SETADP_DATA_SIZEOF(set_access_ctrl));
4594         if (!iob)
4595                 return -ENOMEM;
4596         cmd = __ipa_cmd(iob);
4597         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4598         access_ctrl_req->subcmd_code = mode;
4599
4600         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4601                                NULL);
4602         if (rc) {
4603                 QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
4604                 QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4605                                  rc, CARD_DEVID(card));
4606         }
4607
4608         return rc;
4609 }
4610
4611 void qeth_tx_timeout(struct net_device *dev, unsigned int txqueue)
4612 {
4613         struct qeth_card *card;
4614
4615         card = dev->ml_priv;
4616         QETH_CARD_TEXT(card, 4, "txtimeo");
4617         qeth_schedule_recovery(card);
4618 }
4619 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4620
4621 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4622 {
4623         struct qeth_card *card = dev->ml_priv;
4624         int rc = 0;
4625
4626         switch (regnum) {
4627         case MII_BMCR: /* Basic mode control register */
4628                 rc = BMCR_FULLDPLX;
4629                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4630                     (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4631                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4632                     (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4633                         rc |= BMCR_SPEED100;
4634                 break;
4635         case MII_BMSR: /* Basic mode status register */
4636                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4637                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4638                      BMSR_100BASE4;
4639                 break;
4640         case MII_PHYSID1: /* PHYS ID 1 */
4641                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4642                      dev->dev_addr[2];
4643                 rc = (rc >> 5) & 0xFFFF;
4644                 break;
4645         case MII_PHYSID2: /* PHYS ID 2 */
4646                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4647                 break;
4648         case MII_ADVERTISE: /* Advertisement control reg */
4649                 rc = ADVERTISE_ALL;
4650                 break;
4651         case MII_LPA: /* Link partner ability reg */
4652                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4653                      LPA_100BASE4 | LPA_LPACK;
4654                 break;
4655         case MII_EXPANSION: /* Expansion register */
4656                 break;
4657         case MII_DCOUNTER: /* disconnect counter */
4658                 break;
4659         case MII_FCSCOUNTER: /* false carrier counter */
4660                 break;
4661         case MII_NWAYTEST: /* N-way auto-neg test register */
4662                 break;
4663         case MII_RERRCOUNTER: /* rx error counter */
4664                 rc = card->stats.rx_length_errors +
4665                      card->stats.rx_frame_errors +
4666                      card->stats.rx_fifo_errors;
4667                 break;
4668         case MII_SREVISION: /* silicon revision */
4669                 break;
4670         case MII_RESV1: /* reserved 1 */
4671                 break;
4672         case MII_LBRERROR: /* loopback, rx, bypass error */
4673                 break;
4674         case MII_PHYADDR: /* physical address */
4675                 break;
4676         case MII_RESV2: /* reserved 2 */
4677                 break;
4678         case MII_TPISTATUS: /* TPI status for 10mbps */
4679                 break;
4680         case MII_NCONFIG: /* network interface config */
4681                 break;
4682         default:
4683                 break;
4684         }
4685         return rc;
4686 }
4687
4688 static int qeth_snmp_command_cb(struct qeth_card *card,
4689                                 struct qeth_reply *reply, unsigned long data)
4690 {
4691         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4692         struct qeth_arp_query_info *qinfo = reply->param;
4693         struct qeth_ipacmd_setadpparms *adp_cmd;
4694         unsigned int data_len;
4695         void *snmp_data;
4696
4697         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4698
4699         if (cmd->hdr.return_code) {
4700                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4701                 return -EIO;
4702         }
4703         if (cmd->data.setadapterparms.hdr.return_code) {
4704                 cmd->hdr.return_code =
4705                         cmd->data.setadapterparms.hdr.return_code;
4706                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4707                 return -EIO;
4708         }
4709
4710         adp_cmd = &cmd->data.setadapterparms;
4711         data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
4712         if (adp_cmd->hdr.seq_no == 1) {
4713                 snmp_data = &adp_cmd->data.snmp;
4714         } else {
4715                 snmp_data = &adp_cmd->data.snmp.request;
4716                 data_len -= offsetof(struct qeth_snmp_cmd, request);
4717         }
4718
4719         /* check if there is enough room in userspace */
4720         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4721                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4722                 return -ENOSPC;
4723         }
4724         QETH_CARD_TEXT_(card, 4, "snore%i",
4725                         cmd->data.setadapterparms.hdr.used_total);
4726         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4727                         cmd->data.setadapterparms.hdr.seq_no);
4728         /*copy entries to user buffer*/
4729         memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4730         qinfo->udata_offset += data_len;
4731
4732         if (cmd->data.setadapterparms.hdr.seq_no <
4733             cmd->data.setadapterparms.hdr.used_total)
4734                 return 1;
4735         return 0;
4736 }
4737
4738 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4739 {
4740         struct qeth_snmp_ureq __user *ureq;
4741         struct qeth_cmd_buffer *iob;
4742         unsigned int req_len;
4743         struct qeth_arp_query_info qinfo = {0, };
4744         int rc = 0;
4745
4746         QETH_CARD_TEXT(card, 3, "snmpcmd");
4747
4748         if (IS_VM_NIC(card))
4749                 return -EOPNOTSUPP;
4750
4751         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4752             IS_LAYER3(card))
4753                 return -EOPNOTSUPP;
4754
4755         ureq = (struct qeth_snmp_ureq __user *) udata;
4756         if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
4757             get_user(req_len, &ureq->hdr.req_len))
4758                 return -EFAULT;
4759
4760         /* Sanitize user input, to avoid overflows in iob size calculation: */
4761         if (req_len > QETH_BUFSIZE)
4762                 return -EINVAL;
4763
4764         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
4765         if (!iob)
4766                 return -ENOMEM;
4767
4768         if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
4769                            &ureq->cmd, req_len)) {
4770                 qeth_put_cmd(iob);
4771                 return -EFAULT;
4772         }
4773
4774         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4775         if (!qinfo.udata) {
4776                 qeth_put_cmd(iob);
4777                 return -ENOMEM;
4778         }
4779         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4780
4781         rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4782         if (rc)
4783                 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4784                                  CARD_DEVID(card), rc);
4785         else {
4786                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4787                         rc = -EFAULT;
4788         }
4789
4790         kfree(qinfo.udata);
4791         return rc;
4792 }
4793
4794 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4795                                          struct qeth_reply *reply,
4796                                          unsigned long data)
4797 {
4798         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4799         struct qeth_qoat_priv *priv = reply->param;
4800         int resdatalen;
4801
4802         QETH_CARD_TEXT(card, 3, "qoatcb");
4803         if (qeth_setadpparms_inspect_rc(cmd))
4804                 return -EIO;
4805
4806         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4807
4808         if (resdatalen > (priv->buffer_len - priv->response_len))
4809                 return -ENOSPC;
4810
4811         memcpy(priv->buffer + priv->response_len,
4812                &cmd->data.setadapterparms.hdr, resdatalen);
4813         priv->response_len += resdatalen;
4814
4815         if (cmd->data.setadapterparms.hdr.seq_no <
4816             cmd->data.setadapterparms.hdr.used_total)
4817                 return 1;
4818         return 0;
4819 }
4820
4821 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4822 {
4823         int rc = 0;
4824         struct qeth_cmd_buffer *iob;
4825         struct qeth_ipa_cmd *cmd;
4826         struct qeth_query_oat *oat_req;
4827         struct qeth_query_oat_data oat_data;
4828         struct qeth_qoat_priv priv;
4829         void __user *tmp;
4830
4831         QETH_CARD_TEXT(card, 3, "qoatcmd");
4832
4833         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT))
4834                 return -EOPNOTSUPP;
4835
4836         if (copy_from_user(&oat_data, udata, sizeof(oat_data)))
4837                 return -EFAULT;
4838
4839         priv.buffer_len = oat_data.buffer_len;
4840         priv.response_len = 0;
4841         priv.buffer = vzalloc(oat_data.buffer_len);
4842         if (!priv.buffer)
4843                 return -ENOMEM;
4844
4845         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4846                                    SETADP_DATA_SIZEOF(query_oat));
4847         if (!iob) {
4848                 rc = -ENOMEM;
4849                 goto out_free;
4850         }
4851         cmd = __ipa_cmd(iob);
4852         oat_req = &cmd->data.setadapterparms.data.query_oat;
4853         oat_req->subcmd_code = oat_data.command;
4854
4855         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb, &priv);
4856         if (!rc) {
4857                 tmp = is_compat_task() ? compat_ptr(oat_data.ptr) :
4858                                          u64_to_user_ptr(oat_data.ptr);
4859                 oat_data.response_len = priv.response_len;
4860
4861                 if (copy_to_user(tmp, priv.buffer, priv.response_len) ||
4862                     copy_to_user(udata, &oat_data, sizeof(oat_data)))
4863                         rc = -EFAULT;
4864         }
4865
4866 out_free:
4867         vfree(priv.buffer);
4868         return rc;
4869 }
4870
4871 static int qeth_query_card_info_cb(struct qeth_card *card,
4872                                    struct qeth_reply *reply, unsigned long data)
4873 {
4874         struct carrier_info *carrier_info = (struct carrier_info *)reply->param;
4875         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4876         struct qeth_query_card_info *card_info;
4877
4878         QETH_CARD_TEXT(card, 2, "qcrdincb");
4879         if (qeth_setadpparms_inspect_rc(cmd))
4880                 return -EIO;
4881
4882         card_info = &cmd->data.setadapterparms.data.card_info;
4883         carrier_info->card_type = card_info->card_type;
4884         carrier_info->port_mode = card_info->port_mode;
4885         carrier_info->port_speed = card_info->port_speed;
4886         return 0;
4887 }
4888
4889 int qeth_query_card_info(struct qeth_card *card,
4890                          struct carrier_info *carrier_info)
4891 {
4892         struct qeth_cmd_buffer *iob;
4893
4894         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4895         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4896                 return -EOPNOTSUPP;
4897         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO, 0);
4898         if (!iob)
4899                 return -ENOMEM;
4900         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
4901                                         (void *)carrier_info);
4902 }
4903
4904 /**
4905  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4906  * @card: pointer to a qeth_card
4907  *
4908  * Returns
4909  *      0, if a MAC address has been set for the card's netdevice
4910  *      a return code, for various error conditions
4911  */
4912 int qeth_vm_request_mac(struct qeth_card *card)
4913 {
4914         struct diag26c_mac_resp *response;
4915         struct diag26c_mac_req *request;
4916         int rc;
4917
4918         QETH_CARD_TEXT(card, 2, "vmreqmac");
4919
4920         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
4921         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
4922         if (!request || !response) {
4923                 rc = -ENOMEM;
4924                 goto out;
4925         }
4926
4927         request->resp_buf_len = sizeof(*response);
4928         request->resp_version = DIAG26C_VERSION2;
4929         request->op_code = DIAG26C_GET_MAC;
4930         request->devno = card->info.ddev_devno;
4931
4932         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4933         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
4934         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4935         if (rc)
4936                 goto out;
4937         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
4938
4939         if (request->resp_buf_len < sizeof(*response) ||
4940             response->version != request->resp_version) {
4941                 rc = -EIO;
4942                 QETH_CARD_TEXT(card, 2, "badresp");
4943                 QETH_CARD_HEX(card, 2, &request->resp_buf_len,
4944                               sizeof(request->resp_buf_len));
4945         } else if (!is_valid_ether_addr(response->mac)) {
4946                 rc = -EINVAL;
4947                 QETH_CARD_TEXT(card, 2, "badmac");
4948                 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
4949         } else {
4950                 ether_addr_copy(card->dev->dev_addr, response->mac);
4951         }
4952
4953 out:
4954         kfree(response);
4955         kfree(request);
4956         return rc;
4957 }
4958 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
4959
4960 static void qeth_determine_capabilities(struct qeth_card *card)
4961 {
4962         struct qeth_channel *channel = &card->data;
4963         struct ccw_device *ddev = channel->ccwdev;
4964         int rc;
4965         int ddev_offline = 0;
4966
4967         QETH_CARD_TEXT(card, 2, "detcapab");
4968         if (!ddev->online) {
4969                 ddev_offline = 1;
4970                 rc = qeth_start_channel(channel);
4971                 if (rc) {
4972                         QETH_CARD_TEXT_(card, 2, "3err%d", rc);
4973                         goto out;
4974                 }
4975         }
4976
4977         rc = qeth_read_conf_data(card);
4978         if (rc) {
4979                 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
4980                                  CARD_DEVID(card), rc);
4981                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
4982                 goto out_offline;
4983         }
4984
4985         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
4986         if (rc)
4987                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
4988
4989         QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
4990         QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
4991         QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
4992         QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
4993         QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
4994         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
4995             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
4996             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
4997                 dev_info(&card->gdev->dev,
4998                         "Completion Queueing supported\n");
4999         } else {
5000                 card->options.cq = QETH_CQ_NOTAVAILABLE;
5001         }
5002
5003 out_offline:
5004         if (ddev_offline == 1)
5005                 qeth_stop_channel(channel);
5006 out:
5007         return;
5008 }
5009
5010 static void qeth_read_ccw_conf_data(struct qeth_card *card)
5011 {
5012         struct qeth_card_info *info = &card->info;
5013         struct ccw_device *cdev = CARD_DDEV(card);
5014         struct ccw_dev_id dev_id;
5015
5016         QETH_CARD_TEXT(card, 2, "ccwconfd");
5017         ccw_device_get_id(cdev, &dev_id);
5018
5019         info->ddev_devno = dev_id.devno;
5020         info->ids_valid = !ccw_device_get_cssid(cdev, &info->cssid) &&
5021                           !ccw_device_get_iid(cdev, &info->iid) &&
5022                           !ccw_device_get_chid(cdev, 0, &info->chid);
5023         info->ssid = dev_id.ssid;
5024
5025         dev_info(&card->gdev->dev, "CHID: %x CHPID: %x\n",
5026                  info->chid, info->chpid);
5027
5028         QETH_CARD_TEXT_(card, 3, "devn%x", info->ddev_devno);
5029         QETH_CARD_TEXT_(card, 3, "cssid:%x", info->cssid);
5030         QETH_CARD_TEXT_(card, 3, "iid:%x", info->iid);
5031         QETH_CARD_TEXT_(card, 3, "ssid:%x", info->ssid);
5032         QETH_CARD_TEXT_(card, 3, "chpid:%x", info->chpid);
5033         QETH_CARD_TEXT_(card, 3, "chid:%x", info->chid);
5034         QETH_CARD_TEXT_(card, 3, "idval%x", info->ids_valid);
5035 }
5036
5037 static int qeth_qdio_establish(struct qeth_card *card)
5038 {
5039         struct qdio_buffer **out_sbal_ptrs[QETH_MAX_OUT_QUEUES];
5040         struct qdio_buffer **in_sbal_ptrs[QETH_MAX_IN_QUEUES];
5041         struct qeth_qib_parms *qib_parms = NULL;
5042         struct qdio_initialize init_data;
5043         unsigned int i;
5044         int rc = 0;
5045
5046         QETH_CARD_TEXT(card, 2, "qdioest");
5047
5048         if (!IS_IQD(card) && !IS_VM_NIC(card)) {
5049                 qib_parms = kzalloc(sizeof_field(struct qib, parm), GFP_KERNEL);
5050                 if (!qib_parms)
5051                         return -ENOMEM;
5052
5053                 qeth_fill_qib_parms(card, qib_parms);
5054         }
5055
5056         in_sbal_ptrs[0] = card->qdio.in_q->qdio_bufs;
5057         if (card->options.cq == QETH_CQ_ENABLED)
5058                 in_sbal_ptrs[1] = card->qdio.c_q->qdio_bufs;
5059
5060         for (i = 0; i < card->qdio.no_out_queues; i++)
5061                 out_sbal_ptrs[i] = card->qdio.out_qs[i]->qdio_bufs;
5062
5063         memset(&init_data, 0, sizeof(struct qdio_initialize));
5064         init_data.q_format               = IS_IQD(card) ? QDIO_IQDIO_QFMT :
5065                                                           QDIO_QETH_QFMT;
5066         init_data.qib_param_field_format = 0;
5067         init_data.qib_param_field        = (void *)qib_parms;
5068         init_data.no_input_qs            = card->qdio.no_in_queues;
5069         init_data.no_output_qs           = card->qdio.no_out_queues;
5070         init_data.input_handler          = qeth_qdio_input_handler;
5071         init_data.output_handler         = qeth_qdio_output_handler;
5072         init_data.irq_poll               = qeth_qdio_poll;
5073         init_data.int_parm               = (unsigned long) card;
5074         init_data.input_sbal_addr_array  = in_sbal_ptrs;
5075         init_data.output_sbal_addr_array = out_sbal_ptrs;
5076         init_data.output_sbal_state_array = card->qdio.out_bufstates;
5077         init_data.scan_threshold         = IS_IQD(card) ? 0 : 32;
5078
5079         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
5080                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
5081                 rc = qdio_allocate(CARD_DDEV(card), init_data.no_input_qs,
5082                                    init_data.no_output_qs);
5083                 if (rc) {
5084                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5085                         goto out;
5086                 }
5087                 rc = qdio_establish(CARD_DDEV(card), &init_data);
5088                 if (rc) {
5089                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5090                         qdio_free(CARD_DDEV(card));
5091                 }
5092         }
5093
5094         switch (card->options.cq) {
5095         case QETH_CQ_ENABLED:
5096                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
5097                 break;
5098         case QETH_CQ_DISABLED:
5099                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
5100                 break;
5101         default:
5102                 break;
5103         }
5104
5105 out:
5106         kfree(qib_parms);
5107         return rc;
5108 }
5109
5110 static void qeth_core_free_card(struct qeth_card *card)
5111 {
5112         QETH_CARD_TEXT(card, 2, "freecrd");
5113
5114         unregister_service_level(&card->qeth_service_level);
5115         debugfs_remove_recursive(card->debugfs);
5116         qeth_put_cmd(card->read_cmd);
5117         destroy_workqueue(card->event_wq);
5118         dev_set_drvdata(&card->gdev->dev, NULL);
5119         kfree(card);
5120 }
5121
5122 static void qeth_trace_features(struct qeth_card *card)
5123 {
5124         QETH_CARD_TEXT(card, 2, "features");
5125         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5126         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5127         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5128         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5129                       sizeof(card->info.diagass_support));
5130 }
5131
5132 static struct ccw_device_id qeth_ids[] = {
5133         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5134                                         .driver_info = QETH_CARD_TYPE_OSD},
5135         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5136                                         .driver_info = QETH_CARD_TYPE_IQD},
5137 #ifdef CONFIG_QETH_OSN
5138         {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
5139                                         .driver_info = QETH_CARD_TYPE_OSN},
5140 #endif
5141         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5142                                         .driver_info = QETH_CARD_TYPE_OSM},
5143 #ifdef CONFIG_QETH_OSX
5144         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5145                                         .driver_info = QETH_CARD_TYPE_OSX},
5146 #endif
5147         {},
5148 };
5149 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5150
5151 static struct ccw_driver qeth_ccw_driver = {
5152         .driver = {
5153                 .owner = THIS_MODULE,
5154                 .name = "qeth",
5155         },
5156         .ids = qeth_ids,
5157         .probe = ccwgroup_probe_ccwdev,
5158         .remove = ccwgroup_remove_ccwdev,
5159 };
5160
5161 static int qeth_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
5162 {
5163         int retries = 3;
5164         int rc;
5165
5166         QETH_CARD_TEXT(card, 2, "hrdsetup");
5167         atomic_set(&card->force_alloc_skb, 0);
5168         rc = qeth_update_from_chp_desc(card);
5169         if (rc)
5170                 return rc;
5171 retry:
5172         if (retries < 3)
5173                 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
5174                                  CARD_DEVID(card));
5175         rc = qeth_qdio_clear_card(card, !IS_IQD(card));
5176         qeth_stop_channel(&card->data);
5177         qeth_stop_channel(&card->write);
5178         qeth_stop_channel(&card->read);
5179         qdio_free(CARD_DDEV(card));
5180
5181         rc = qeth_start_channel(&card->read);
5182         if (rc)
5183                 goto retriable;
5184         rc = qeth_start_channel(&card->write);
5185         if (rc)
5186                 goto retriable;
5187         rc = qeth_start_channel(&card->data);
5188         if (rc)
5189                 goto retriable;
5190 retriable:
5191         if (rc == -ERESTARTSYS) {
5192                 QETH_CARD_TEXT(card, 2, "break1");
5193                 return rc;
5194         } else if (rc) {
5195                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5196                 if (--retries < 0)
5197                         goto out;
5198                 else
5199                         goto retry;
5200         }
5201
5202         qeth_determine_capabilities(card);
5203         qeth_read_ccw_conf_data(card);
5204         qeth_idx_init(card);
5205
5206         rc = qeth_idx_activate_read_channel(card);
5207         if (rc == -EINTR) {
5208                 QETH_CARD_TEXT(card, 2, "break2");
5209                 return rc;
5210         } else if (rc) {
5211                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5212                 if (--retries < 0)
5213                         goto out;
5214                 else
5215                         goto retry;
5216         }
5217
5218         rc = qeth_idx_activate_write_channel(card);
5219         if (rc == -EINTR) {
5220                 QETH_CARD_TEXT(card, 2, "break3");
5221                 return rc;
5222         } else if (rc) {
5223                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
5224                 if (--retries < 0)
5225                         goto out;
5226                 else
5227                         goto retry;
5228         }
5229         card->read_or_write_problem = 0;
5230         rc = qeth_mpc_initialize(card);
5231         if (rc) {
5232                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5233                 goto out;
5234         }
5235
5236         rc = qeth_send_startlan(card);
5237         if (rc) {
5238                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5239                 if (rc == -ENETDOWN) {
5240                         dev_warn(&card->gdev->dev, "The LAN is offline\n");
5241                         *carrier_ok = false;
5242                 } else {
5243                         goto out;
5244                 }
5245         } else {
5246                 *carrier_ok = true;
5247         }
5248
5249         card->options.ipa4.supported = 0;
5250         card->options.ipa6.supported = 0;
5251         card->options.adp.supported = 0;
5252         card->options.sbp.supported_funcs = 0;
5253         card->info.diagass_support = 0;
5254         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5255         if (rc == -ENOMEM)
5256                 goto out;
5257         if (qeth_is_supported(card, IPA_IPV6)) {
5258                 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5259                 if (rc == -ENOMEM)
5260                         goto out;
5261         }
5262         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5263                 rc = qeth_query_setadapterparms(card);
5264                 if (rc < 0) {
5265                         QETH_CARD_TEXT_(card, 2, "7err%d", rc);
5266                         goto out;
5267                 }
5268         }
5269         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5270                 rc = qeth_query_setdiagass(card);
5271                 if (rc)
5272                         QETH_CARD_TEXT_(card, 2, "8err%d", rc);
5273         }
5274
5275         qeth_trace_features(card);
5276
5277         if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) ||
5278             (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)))
5279                 card->info.hwtrap = 0;
5280
5281         if (card->options.isolation != ISOLATION_MODE_NONE) {
5282                 rc = qeth_setadpparms_set_access_ctrl(card,
5283                                                       card->options.isolation);
5284                 if (rc)
5285                         goto out;
5286         }
5287
5288         rc = qeth_init_qdio_queues(card);
5289         if (rc) {
5290                 QETH_CARD_TEXT_(card, 2, "9err%d", rc);
5291                 goto out;
5292         }
5293
5294         return 0;
5295 out:
5296         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5297                 "an error on the device\n");
5298         QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5299                          CARD_DEVID(card), rc);
5300         return rc;
5301 }
5302
5303 static int qeth_set_online(struct qeth_card *card)
5304 {
5305         bool carrier_ok;
5306         int rc;
5307
5308         mutex_lock(&card->discipline_mutex);
5309         mutex_lock(&card->conf_mutex);
5310         QETH_CARD_TEXT(card, 2, "setonlin");
5311
5312         rc = qeth_hardsetup_card(card, &carrier_ok);
5313         if (rc) {
5314                 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
5315                 rc = -ENODEV;
5316                 goto err_hardsetup;
5317         }
5318
5319         qeth_print_status_message(card);
5320
5321         if (card->dev->reg_state != NETREG_REGISTERED)
5322                 /* no need for locking / error handling at this early stage: */
5323                 qeth_set_real_num_tx_queues(card, qeth_tx_actual_queues(card));
5324
5325         rc = card->discipline->set_online(card, carrier_ok);
5326         if (rc)
5327                 goto err_online;
5328
5329         /* let user_space know that device is online */
5330         kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5331
5332         mutex_unlock(&card->conf_mutex);
5333         mutex_unlock(&card->discipline_mutex);
5334         return 0;
5335
5336 err_online:
5337 err_hardsetup:
5338         qeth_qdio_clear_card(card, 0);
5339         qeth_clear_working_pool_list(card);
5340         qeth_flush_local_addrs(card);
5341
5342         qeth_stop_channel(&card->data);
5343         qeth_stop_channel(&card->write);
5344         qeth_stop_channel(&card->read);
5345         qdio_free(CARD_DDEV(card));
5346
5347         mutex_unlock(&card->conf_mutex);
5348         mutex_unlock(&card->discipline_mutex);
5349         return rc;
5350 }
5351
5352 int qeth_set_offline(struct qeth_card *card, bool resetting)
5353 {
5354         int rc, rc2, rc3;
5355
5356         mutex_lock(&card->discipline_mutex);
5357         mutex_lock(&card->conf_mutex);
5358         QETH_CARD_TEXT(card, 3, "setoffl");
5359
5360         if ((!resetting && card->info.hwtrap) || card->info.hwtrap == 2) {
5361                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5362                 card->info.hwtrap = 1;
5363         }
5364
5365         /* cancel any stalled cmd that might block the rtnl: */
5366         qeth_clear_ipacmd_list(card);
5367
5368         rtnl_lock();
5369         card->info.open_when_online = card->dev->flags & IFF_UP;
5370         dev_close(card->dev);
5371         netif_device_detach(card->dev);
5372         netif_carrier_off(card->dev);
5373         rtnl_unlock();
5374
5375         cancel_work_sync(&card->rx_mode_work);
5376
5377         card->discipline->set_offline(card);
5378
5379         qeth_qdio_clear_card(card, 0);
5380         qeth_drain_output_queues(card);
5381         qeth_clear_working_pool_list(card);
5382         qeth_flush_local_addrs(card);
5383         card->info.promisc_mode = 0;
5384
5385         rc  = qeth_stop_channel(&card->data);
5386         rc2 = qeth_stop_channel(&card->write);
5387         rc3 = qeth_stop_channel(&card->read);
5388         if (!rc)
5389                 rc = (rc2) ? rc2 : rc3;
5390         if (rc)
5391                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5392         qdio_free(CARD_DDEV(card));
5393
5394         /* let user_space know that device is offline */
5395         kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5396
5397         mutex_unlock(&card->conf_mutex);
5398         mutex_unlock(&card->discipline_mutex);
5399         return 0;
5400 }
5401 EXPORT_SYMBOL_GPL(qeth_set_offline);
5402
5403 static int qeth_do_reset(void *data)
5404 {
5405         struct qeth_card *card = data;
5406         int rc;
5407
5408         QETH_CARD_TEXT(card, 2, "recover1");
5409         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
5410                 return 0;
5411         QETH_CARD_TEXT(card, 2, "recover2");
5412         dev_warn(&card->gdev->dev,
5413                  "A recovery process has been started for the device\n");
5414
5415         qeth_set_offline(card, true);
5416         rc = qeth_set_online(card);
5417         if (!rc) {
5418                 dev_info(&card->gdev->dev,
5419                          "Device successfully recovered!\n");
5420         } else {
5421                 ccwgroup_set_offline(card->gdev);
5422                 dev_warn(&card->gdev->dev,
5423                          "The qeth device driver failed to recover an error on the device\n");
5424         }
5425         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
5426         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
5427         return 0;
5428 }
5429
5430 #if IS_ENABLED(CONFIG_QETH_L3)
5431 static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
5432                                 struct qeth_hdr *hdr)
5433 {
5434         struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data;
5435         struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
5436         struct net_device *dev = skb->dev;
5437
5438         if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) {
5439                 dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr,
5440                                 "FAKELL", skb->len);
5441                 return;
5442         }
5443
5444         if (!(l3_hdr->flags & QETH_HDR_PASSTHRU)) {
5445                 u16 prot = (l3_hdr->flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
5446                                                              ETH_P_IP;
5447                 unsigned char tg_addr[ETH_ALEN];
5448
5449                 skb_reset_network_header(skb);
5450                 switch (l3_hdr->flags & QETH_HDR_CAST_MASK) {
5451                 case QETH_CAST_MULTICAST:
5452                         if (prot == ETH_P_IP)
5453                                 ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
5454                         else
5455                                 ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
5456                         QETH_CARD_STAT_INC(card, rx_multicast);
5457                         break;
5458                 case QETH_CAST_BROADCAST:
5459                         ether_addr_copy(tg_addr, dev->broadcast);
5460                         QETH_CARD_STAT_INC(card, rx_multicast);
5461                         break;
5462                 default:
5463                         if (card->options.sniffer)
5464                                 skb->pkt_type = PACKET_OTHERHOST;
5465                         ether_addr_copy(tg_addr, dev->dev_addr);
5466                 }
5467
5468                 if (l3_hdr->ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
5469                         dev_hard_header(skb, dev, prot, tg_addr,
5470                                         &l3_hdr->next_hop.rx.src_mac, skb->len);
5471                 else
5472                         dev_hard_header(skb, dev, prot, tg_addr, "FAKELL",
5473                                         skb->len);
5474         }
5475
5476         /* copy VLAN tag from hdr into skb */
5477         if (!card->options.sniffer &&
5478             (l3_hdr->ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
5479                                   QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
5480                 u16 tag = (l3_hdr->ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
5481                                 l3_hdr->vlan_id :
5482                                 l3_hdr->next_hop.rx.vlan_id;
5483
5484                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
5485         }
5486 }
5487 #endif
5488
5489 static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb,
5490                              struct qeth_hdr *hdr, bool uses_frags)
5491 {
5492         struct napi_struct *napi = &card->napi;
5493         bool is_cso;
5494
5495         switch (hdr->hdr.l2.id) {
5496         case QETH_HEADER_TYPE_OSN:
5497                 skb_push(skb, sizeof(*hdr));
5498                 skb_copy_to_linear_data(skb, hdr, sizeof(*hdr));
5499                 QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5500                 QETH_CARD_STAT_INC(card, rx_packets);
5501
5502                 card->osn_info.data_cb(skb);
5503                 return;
5504 #if IS_ENABLED(CONFIG_QETH_L3)
5505         case QETH_HEADER_TYPE_LAYER3:
5506                 qeth_l3_rebuild_skb(card, skb, hdr);
5507                 is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5508                 break;
5509 #endif
5510         case QETH_HEADER_TYPE_LAYER2:
5511                 is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5512                 break;
5513         default:
5514                 /* never happens */
5515                 if (uses_frags)
5516                         napi_free_frags(napi);
5517                 else
5518                         dev_kfree_skb_any(skb);
5519                 return;
5520         }
5521
5522         if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) {
5523                 skb->ip_summed = CHECKSUM_UNNECESSARY;
5524                 QETH_CARD_STAT_INC(card, rx_skb_csum);
5525         } else {
5526                 skb->ip_summed = CHECKSUM_NONE;
5527         }
5528
5529         QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5530         QETH_CARD_STAT_INC(card, rx_packets);
5531         if (skb_is_nonlinear(skb)) {
5532                 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5533                 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5534                                    skb_shinfo(skb)->nr_frags);
5535         }
5536
5537         if (uses_frags) {
5538                 napi_gro_frags(napi);
5539         } else {
5540                 skb->protocol = eth_type_trans(skb, skb->dev);
5541                 napi_gro_receive(napi, skb);
5542         }
5543 }
5544
5545 static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len)
5546 {
5547         struct page *page = virt_to_page(data);
5548         unsigned int next_frag;
5549
5550         next_frag = skb_shinfo(skb)->nr_frags;
5551         get_page(page);
5552         skb_add_rx_frag(skb, next_frag, page, offset_in_page(data), data_len,
5553                         data_len);
5554 }
5555
5556 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5557 {
5558         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5559 }
5560
5561 static int qeth_extract_skb(struct qeth_card *card,
5562                             struct qeth_qdio_buffer *qethbuffer, u8 *element_no,
5563                             int *__offset)
5564 {
5565         struct qeth_priv *priv = netdev_priv(card->dev);
5566         struct qdio_buffer *buffer = qethbuffer->buffer;
5567         struct napi_struct *napi = &card->napi;
5568         struct qdio_buffer_element *element;
5569         unsigned int linear_len = 0;
5570         bool uses_frags = false;
5571         int offset = *__offset;
5572         bool use_rx_sg = false;
5573         unsigned int headroom;
5574         struct qeth_hdr *hdr;
5575         struct sk_buff *skb;
5576         int skb_len = 0;
5577
5578         element = &buffer->element[*element_no];
5579
5580 next_packet:
5581         /* qeth_hdr must not cross element boundaries */
5582         while (element->length < offset + sizeof(struct qeth_hdr)) {
5583                 if (qeth_is_last_sbale(element))
5584                         return -ENODATA;
5585                 element++;
5586                 offset = 0;
5587         }
5588
5589         hdr = phys_to_virt(element->addr) + offset;
5590         offset += sizeof(*hdr);
5591         skb = NULL;
5592
5593         switch (hdr->hdr.l2.id) {
5594         case QETH_HEADER_TYPE_LAYER2:
5595                 skb_len = hdr->hdr.l2.pkt_length;
5596                 linear_len = ETH_HLEN;
5597                 headroom = 0;
5598                 break;
5599         case QETH_HEADER_TYPE_LAYER3:
5600                 skb_len = hdr->hdr.l3.length;
5601                 if (!IS_LAYER3(card)) {
5602                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5603                         goto walk_packet;
5604                 }
5605
5606                 if (hdr->hdr.l3.flags & QETH_HDR_PASSTHRU) {
5607                         linear_len = ETH_HLEN;
5608                         headroom = 0;
5609                         break;
5610                 }
5611
5612                 if (hdr->hdr.l3.flags & QETH_HDR_IPV6)
5613                         linear_len = sizeof(struct ipv6hdr);
5614                 else
5615                         linear_len = sizeof(struct iphdr);
5616                 headroom = ETH_HLEN;
5617                 break;
5618         case QETH_HEADER_TYPE_OSN:
5619                 skb_len = hdr->hdr.osn.pdu_length;
5620                 if (!IS_OSN(card)) {
5621                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5622                         goto walk_packet;
5623                 }
5624
5625                 linear_len = skb_len;
5626                 headroom = sizeof(struct qeth_hdr);
5627                 break;
5628         default:
5629                 if (hdr->hdr.l2.id & QETH_HEADER_MASK_INVAL)
5630                         QETH_CARD_STAT_INC(card, rx_frame_errors);
5631                 else
5632                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5633
5634                 /* Can't determine packet length, drop the whole buffer. */
5635                 return -EPROTONOSUPPORT;
5636         }
5637
5638         if (skb_len < linear_len) {
5639                 QETH_CARD_STAT_INC(card, rx_dropped_runt);
5640                 goto walk_packet;
5641         }
5642
5643         use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) ||
5644                     (skb_len > READ_ONCE(priv->rx_copybreak) &&
5645                      !atomic_read(&card->force_alloc_skb) &&
5646                      !IS_OSN(card));
5647
5648         if (use_rx_sg) {
5649                 /* QETH_CQ_ENABLED only: */
5650                 if (qethbuffer->rx_skb &&
5651                     skb_tailroom(qethbuffer->rx_skb) >= linear_len + headroom) {
5652                         skb = qethbuffer->rx_skb;
5653                         qethbuffer->rx_skb = NULL;
5654                         goto use_skb;
5655                 }
5656
5657                 skb = napi_get_frags(napi);
5658                 if (!skb) {
5659                         /* -ENOMEM, no point in falling back further. */
5660                         QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5661                         goto walk_packet;
5662                 }
5663
5664                 if (skb_tailroom(skb) >= linear_len + headroom) {
5665                         uses_frags = true;
5666                         goto use_skb;
5667                 }
5668
5669                 netdev_info_once(card->dev,
5670                                  "Insufficient linear space in NAPI frags skb, need %u but have %u\n",
5671                                  linear_len + headroom, skb_tailroom(skb));
5672                 /* Shouldn't happen. Don't optimize, fall back to linear skb. */
5673         }
5674
5675         linear_len = skb_len;
5676         skb = napi_alloc_skb(napi, linear_len + headroom);
5677         if (!skb) {
5678                 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5679                 goto walk_packet;
5680         }
5681
5682 use_skb:
5683         if (headroom)
5684                 skb_reserve(skb, headroom);
5685 walk_packet:
5686         while (skb_len) {
5687                 int data_len = min(skb_len, (int)(element->length - offset));
5688                 char *data = phys_to_virt(element->addr) + offset;
5689
5690                 skb_len -= data_len;
5691                 offset += data_len;
5692
5693                 /* Extract data from current element: */
5694                 if (skb && data_len) {
5695                         if (linear_len) {
5696                                 unsigned int copy_len;
5697
5698                                 copy_len = min_t(unsigned int, linear_len,
5699                                                  data_len);
5700
5701                                 skb_put_data(skb, data, copy_len);
5702                                 linear_len -= copy_len;
5703                                 data_len -= copy_len;
5704                                 data += copy_len;
5705                         }
5706
5707                         if (data_len)
5708                                 qeth_create_skb_frag(skb, data, data_len);
5709                 }
5710
5711                 /* Step forward to next element: */
5712                 if (skb_len) {
5713                         if (qeth_is_last_sbale(element)) {
5714                                 QETH_CARD_TEXT(card, 4, "unexeob");
5715                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5716                                 if (skb) {
5717                                         if (uses_frags)
5718                                                 napi_free_frags(napi);
5719                                         else
5720                                                 dev_kfree_skb_any(skb);
5721                                         QETH_CARD_STAT_INC(card,
5722                                                            rx_length_errors);
5723                                 }
5724                                 return -EMSGSIZE;
5725                         }
5726                         element++;
5727                         offset = 0;
5728                 }
5729         }
5730
5731         /* This packet was skipped, go get another one: */
5732         if (!skb)
5733                 goto next_packet;
5734
5735         *element_no = element - &buffer->element[0];
5736         *__offset = offset;
5737
5738         qeth_receive_skb(card, skb, hdr, uses_frags);
5739         return 0;
5740 }
5741
5742 static unsigned int qeth_extract_skbs(struct qeth_card *card, int budget,
5743                                       struct qeth_qdio_buffer *buf, bool *done)
5744 {
5745         unsigned int work_done = 0;
5746
5747         while (budget) {
5748                 if (qeth_extract_skb(card, buf, &card->rx.buf_element,
5749                                      &card->rx.e_offset)) {
5750                         *done = true;
5751                         break;
5752                 }
5753
5754                 work_done++;
5755                 budget--;
5756         }
5757
5758         return work_done;
5759 }
5760
5761 static unsigned int qeth_rx_poll(struct qeth_card *card, int budget)
5762 {
5763         struct qeth_rx *ctx = &card->rx;
5764         unsigned int work_done = 0;
5765
5766         while (budget > 0) {
5767                 struct qeth_qdio_buffer *buffer;
5768                 unsigned int skbs_done = 0;
5769                 bool done = false;
5770
5771                 /* Fetch completed RX buffers: */
5772                 if (!card->rx.b_count) {
5773                         card->rx.qdio_err = 0;
5774                         card->rx.b_count = qdio_get_next_buffers(
5775                                 card->data.ccwdev, 0, &card->rx.b_index,
5776                                 &card->rx.qdio_err);
5777                         if (card->rx.b_count <= 0) {
5778                                 card->rx.b_count = 0;
5779                                 break;
5780                         }
5781                 }
5782
5783                 /* Process one completed RX buffer: */
5784                 buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5785                 if (!(card->rx.qdio_err &&
5786                       qeth_check_qdio_errors(card, buffer->buffer,
5787                                              card->rx.qdio_err, "qinerr")))
5788                         skbs_done = qeth_extract_skbs(card, budget, buffer,
5789                                                       &done);
5790                 else
5791                         done = true;
5792
5793                 work_done += skbs_done;
5794                 budget -= skbs_done;
5795
5796                 if (done) {
5797                         QETH_CARD_STAT_INC(card, rx_bufs);
5798                         qeth_put_buffer_pool_entry(card, buffer->pool_entry);
5799                         buffer->pool_entry = NULL;
5800                         card->rx.b_count--;
5801                         ctx->bufs_refill++;
5802                         ctx->bufs_refill -= qeth_rx_refill_queue(card,
5803                                                                  ctx->bufs_refill);
5804
5805                         /* Step forward to next buffer: */
5806                         card->rx.b_index = QDIO_BUFNR(card->rx.b_index + 1);
5807                         card->rx.buf_element = 0;
5808                         card->rx.e_offset = 0;
5809                 }
5810         }
5811
5812         return work_done;
5813 }
5814
5815 static void qeth_cq_poll(struct qeth_card *card)
5816 {
5817         unsigned int work_done = 0;
5818
5819         while (work_done < QDIO_MAX_BUFFERS_PER_Q) {
5820                 unsigned int start, error;
5821                 int completed;
5822
5823                 completed = qdio_inspect_queue(CARD_DDEV(card), 1, true, &start,
5824                                                &error);
5825                 if (completed <= 0)
5826                         return;
5827
5828                 qeth_qdio_cq_handler(card, error, 1, start, completed);
5829                 work_done += completed;
5830         }
5831 }
5832
5833 int qeth_poll(struct napi_struct *napi, int budget)
5834 {
5835         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5836         unsigned int work_done;
5837
5838         work_done = qeth_rx_poll(card, budget);
5839
5840         if (card->options.cq == QETH_CQ_ENABLED)
5841                 qeth_cq_poll(card);
5842
5843         if (budget) {
5844                 struct qeth_rx *ctx = &card->rx;
5845
5846                 /* Process any substantial refill backlog: */
5847                 ctx->bufs_refill -= qeth_rx_refill_queue(card, ctx->bufs_refill);
5848
5849                 /* Exhausted the RX budget. Keep IRQ disabled, we get called again. */
5850                 if (work_done >= budget)
5851                         return work_done;
5852         }
5853
5854         if (napi_complete_done(napi, work_done) &&
5855             qdio_start_irq(CARD_DDEV(card)))
5856                 napi_schedule(napi);
5857
5858         return work_done;
5859 }
5860 EXPORT_SYMBOL_GPL(qeth_poll);
5861
5862 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
5863                                  unsigned int bidx, bool error, int budget)
5864 {
5865         struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
5866         u8 sflags = buffer->buffer->element[15].sflags;
5867         struct qeth_card *card = queue->card;
5868
5869         if (queue->bufstates && (queue->bufstates[bidx].flags &
5870                                  QDIO_OUTBUF_STATE_FLAG_PENDING)) {
5871                 WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
5872
5873                 if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
5874                                                    QETH_QDIO_BUF_PENDING) ==
5875                     QETH_QDIO_BUF_PRIMED) {
5876                         qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
5877
5878                         /* Handle race with qeth_qdio_handle_aob(): */
5879                         switch (atomic_xchg(&buffer->state,
5880                                             QETH_QDIO_BUF_NEED_QAOB)) {
5881                         case QETH_QDIO_BUF_PENDING:
5882                                 /* No concurrent QAOB notification. */
5883                                 break;
5884                         case QETH_QDIO_BUF_QAOB_OK:
5885                                 qeth_notify_skbs(queue, buffer,
5886                                                  TX_NOTIFY_DELAYED_OK);
5887                                 atomic_set(&buffer->state,
5888                                            QETH_QDIO_BUF_HANDLED_DELAYED);
5889                                 break;
5890                         case QETH_QDIO_BUF_QAOB_ERROR:
5891                                 qeth_notify_skbs(queue, buffer,
5892                                                  TX_NOTIFY_DELAYED_GENERALERROR);
5893                                 atomic_set(&buffer->state,
5894                                            QETH_QDIO_BUF_HANDLED_DELAYED);
5895                                 break;
5896                         default:
5897                                 WARN_ON_ONCE(1);
5898                         }
5899                 }
5900
5901                 QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
5902
5903                 /* prepare the queue slot for re-use: */
5904                 qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
5905                 if (qeth_init_qdio_out_buf(queue, bidx)) {
5906                         QETH_CARD_TEXT(card, 2, "outofbuf");
5907                         qeth_schedule_recovery(card);
5908                 }
5909
5910                 return;
5911         }
5912
5913         if (card->options.cq == QETH_CQ_ENABLED)
5914                 qeth_notify_skbs(queue, buffer,
5915                                  qeth_compute_cq_notification(sflags, 0));
5916         qeth_clear_output_buffer(queue, buffer, error, budget);
5917 }
5918
5919 static int qeth_tx_poll(struct napi_struct *napi, int budget)
5920 {
5921         struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
5922         unsigned int queue_no = queue->queue_no;
5923         struct qeth_card *card = queue->card;
5924         struct net_device *dev = card->dev;
5925         unsigned int work_done = 0;
5926         struct netdev_queue *txq;
5927
5928         txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
5929
5930         while (1) {
5931                 unsigned int start, error, i;
5932                 unsigned int packets = 0;
5933                 unsigned int bytes = 0;
5934                 int completed;
5935
5936                 if (qeth_out_queue_is_empty(queue)) {
5937                         napi_complete(napi);
5938                         return 0;
5939                 }
5940
5941                 /* Give the CPU a breather: */
5942                 if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
5943                         QETH_TXQ_STAT_INC(queue, completion_yield);
5944                         if (napi_complete_done(napi, 0))
5945                                 napi_schedule(napi);
5946                         return 0;
5947                 }
5948
5949                 completed = qdio_inspect_queue(CARD_DDEV(card), queue_no, false,
5950                                                &start, &error);
5951                 if (completed <= 0) {
5952                         /* Ensure we see TX completion for pending work: */
5953                         if (napi_complete_done(napi, 0))
5954                                 qeth_tx_arm_timer(queue, QETH_TX_TIMER_USECS);
5955                         return 0;
5956                 }
5957
5958                 for (i = start; i < start + completed; i++) {
5959                         struct qeth_qdio_out_buffer *buffer;
5960                         unsigned int bidx = QDIO_BUFNR(i);
5961
5962                         buffer = queue->bufs[bidx];
5963                         packets += buffer->frames;
5964                         bytes += buffer->bytes;
5965
5966                         qeth_handle_send_error(card, buffer, error);
5967                         qeth_iqd_tx_complete(queue, bidx, error, budget);
5968                         qeth_cleanup_handled_pending(queue, bidx, false);
5969                 }
5970
5971                 netdev_tx_completed_queue(txq, packets, bytes);
5972                 atomic_sub(completed, &queue->used_buffers);
5973                 work_done += completed;
5974
5975                 /* xmit may have observed the full-condition, but not yet
5976                  * stopped the txq. In which case the code below won't trigger.
5977                  * So before returning, xmit will re-check the txq's fill level
5978                  * and wake it up if needed.
5979                  */
5980                 if (netif_tx_queue_stopped(txq) &&
5981                     !qeth_out_queue_is_full(queue))
5982                         netif_tx_wake_queue(txq);
5983         }
5984 }
5985
5986 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
5987 {
5988         if (!cmd->hdr.return_code)
5989                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5990         return cmd->hdr.return_code;
5991 }
5992
5993 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
5994                                         struct qeth_reply *reply,
5995                                         unsigned long data)
5996 {
5997         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5998         struct qeth_ipa_caps *caps = reply->param;
5999
6000         if (qeth_setassparms_inspect_rc(cmd))
6001                 return -EIO;
6002
6003         caps->supported = cmd->data.setassparms.data.caps.supported;
6004         caps->enabled = cmd->data.setassparms.data.caps.enabled;
6005         return 0;
6006 }
6007
6008 int qeth_setassparms_cb(struct qeth_card *card,
6009                         struct qeth_reply *reply, unsigned long data)
6010 {
6011         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6012
6013         QETH_CARD_TEXT(card, 4, "defadpcb");
6014
6015         if (cmd->hdr.return_code)
6016                 return -EIO;
6017
6018         cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6019         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
6020                 card->options.ipa4.enabled = cmd->hdr.assists.enabled;
6021         if (cmd->hdr.prot_version == QETH_PROT_IPV6)
6022                 card->options.ipa6.enabled = cmd->hdr.assists.enabled;
6023         return 0;
6024 }
6025 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
6026
6027 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
6028                                                  enum qeth_ipa_funcs ipa_func,
6029                                                  u16 cmd_code,
6030                                                  unsigned int data_length,
6031                                                  enum qeth_prot_versions prot)
6032 {
6033         struct qeth_ipacmd_setassparms *setassparms;
6034         struct qeth_ipacmd_setassparms_hdr *hdr;
6035         struct qeth_cmd_buffer *iob;
6036
6037         QETH_CARD_TEXT(card, 4, "getasscm");
6038         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
6039                                  data_length +
6040                                  offsetof(struct qeth_ipacmd_setassparms,
6041                                           data));
6042         if (!iob)
6043                 return NULL;
6044
6045         setassparms = &__ipa_cmd(iob)->data.setassparms;
6046         setassparms->assist_no = ipa_func;
6047
6048         hdr = &setassparms->hdr;
6049         hdr->length = sizeof(*hdr) + data_length;
6050         hdr->command_code = cmd_code;
6051         return iob;
6052 }
6053 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
6054
6055 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
6056                                       enum qeth_ipa_funcs ipa_func,
6057                                       u16 cmd_code, u32 *data,
6058                                       enum qeth_prot_versions prot)
6059 {
6060         unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
6061         struct qeth_cmd_buffer *iob;
6062
6063         QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
6064         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
6065         if (!iob)
6066                 return -ENOMEM;
6067
6068         if (data)
6069                 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
6070         return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
6071 }
6072 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
6073
6074 static void qeth_unregister_dbf_views(void)
6075 {
6076         int x;
6077
6078         for (x = 0; x < QETH_DBF_INFOS; x++) {
6079                 debug_unregister(qeth_dbf[x].id);
6080                 qeth_dbf[x].id = NULL;
6081         }
6082 }
6083
6084 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
6085 {
6086         char dbf_txt_buf[32];
6087         va_list args;
6088
6089         if (!debug_level_enabled(id, level))
6090                 return;
6091         va_start(args, fmt);
6092         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
6093         va_end(args);
6094         debug_text_event(id, level, dbf_txt_buf);
6095 }
6096 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
6097
6098 static int qeth_register_dbf_views(void)
6099 {
6100         int ret;
6101         int x;
6102
6103         for (x = 0; x < QETH_DBF_INFOS; x++) {
6104                 /* register the areas */
6105                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
6106                                                 qeth_dbf[x].pages,
6107                                                 qeth_dbf[x].areas,
6108                                                 qeth_dbf[x].len);
6109                 if (qeth_dbf[x].id == NULL) {
6110                         qeth_unregister_dbf_views();
6111                         return -ENOMEM;
6112                 }
6113
6114                 /* register a view */
6115                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
6116                 if (ret) {
6117                         qeth_unregister_dbf_views();
6118                         return ret;
6119                 }
6120
6121                 /* set a passing level */
6122                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
6123         }
6124
6125         return 0;
6126 }
6127
6128 static DEFINE_MUTEX(qeth_mod_mutex);    /* for synchronized module loading */
6129
6130 int qeth_core_load_discipline(struct qeth_card *card,
6131                 enum qeth_discipline_id discipline)
6132 {
6133         mutex_lock(&qeth_mod_mutex);
6134         switch (discipline) {
6135         case QETH_DISCIPLINE_LAYER3:
6136                 card->discipline = try_then_request_module(
6137                         symbol_get(qeth_l3_discipline), "qeth_l3");
6138                 break;
6139         case QETH_DISCIPLINE_LAYER2:
6140                 card->discipline = try_then_request_module(
6141                         symbol_get(qeth_l2_discipline), "qeth_l2");
6142                 break;
6143         default:
6144                 break;
6145         }
6146         mutex_unlock(&qeth_mod_mutex);
6147
6148         if (!card->discipline) {
6149                 dev_err(&card->gdev->dev, "There is no kernel module to "
6150                         "support discipline %d\n", discipline);
6151                 return -EINVAL;
6152         }
6153
6154         card->options.layer = discipline;
6155         return 0;
6156 }
6157
6158 void qeth_core_free_discipline(struct qeth_card *card)
6159 {
6160         if (IS_LAYER2(card))
6161                 symbol_put(qeth_l2_discipline);
6162         else
6163                 symbol_put(qeth_l3_discipline);
6164         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
6165         card->discipline = NULL;
6166 }
6167
6168 const struct device_type qeth_generic_devtype = {
6169         .name = "qeth_generic",
6170         .groups = qeth_generic_attr_groups,
6171 };
6172 EXPORT_SYMBOL_GPL(qeth_generic_devtype);
6173
6174 static const struct device_type qeth_osn_devtype = {
6175         .name = "qeth_osn",
6176         .groups = qeth_osn_attr_groups,
6177 };
6178
6179 #define DBF_NAME_LEN    20
6180
6181 struct qeth_dbf_entry {
6182         char dbf_name[DBF_NAME_LEN];
6183         debug_info_t *dbf_info;
6184         struct list_head dbf_list;
6185 };
6186
6187 static LIST_HEAD(qeth_dbf_list);
6188 static DEFINE_MUTEX(qeth_dbf_list_mutex);
6189
6190 static debug_info_t *qeth_get_dbf_entry(char *name)
6191 {
6192         struct qeth_dbf_entry *entry;
6193         debug_info_t *rc = NULL;
6194
6195         mutex_lock(&qeth_dbf_list_mutex);
6196         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
6197                 if (strcmp(entry->dbf_name, name) == 0) {
6198                         rc = entry->dbf_info;
6199                         break;
6200                 }
6201         }
6202         mutex_unlock(&qeth_dbf_list_mutex);
6203         return rc;
6204 }
6205
6206 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
6207 {
6208         struct qeth_dbf_entry *new_entry;
6209
6210         card->debug = debug_register(name, 2, 1, 8);
6211         if (!card->debug) {
6212                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
6213                 goto err;
6214         }
6215         if (debug_register_view(card->debug, &debug_hex_ascii_view))
6216                 goto err_dbg;
6217         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
6218         if (!new_entry)
6219                 goto err_dbg;
6220         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
6221         new_entry->dbf_info = card->debug;
6222         mutex_lock(&qeth_dbf_list_mutex);
6223         list_add(&new_entry->dbf_list, &qeth_dbf_list);
6224         mutex_unlock(&qeth_dbf_list_mutex);
6225
6226         return 0;
6227
6228 err_dbg:
6229         debug_unregister(card->debug);
6230 err:
6231         return -ENOMEM;
6232 }
6233
6234 static void qeth_clear_dbf_list(void)
6235 {
6236         struct qeth_dbf_entry *entry, *tmp;
6237
6238         mutex_lock(&qeth_dbf_list_mutex);
6239         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
6240                 list_del(&entry->dbf_list);
6241                 debug_unregister(entry->dbf_info);
6242                 kfree(entry);
6243         }
6244         mutex_unlock(&qeth_dbf_list_mutex);
6245 }
6246
6247 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
6248 {
6249         struct net_device *dev;
6250         struct qeth_priv *priv;
6251
6252         switch (card->info.type) {
6253         case QETH_CARD_TYPE_IQD:
6254                 dev = alloc_netdev_mqs(sizeof(*priv), "hsi%d", NET_NAME_UNKNOWN,
6255                                        ether_setup, QETH_MAX_OUT_QUEUES, 1);
6256                 break;
6257         case QETH_CARD_TYPE_OSM:
6258                 dev = alloc_etherdev(sizeof(*priv));
6259                 break;
6260         case QETH_CARD_TYPE_OSN:
6261                 dev = alloc_netdev(sizeof(*priv), "osn%d", NET_NAME_UNKNOWN,
6262                                    ether_setup);
6263                 break;
6264         default:
6265                 dev = alloc_etherdev_mqs(sizeof(*priv), QETH_MAX_OUT_QUEUES, 1);
6266         }
6267
6268         if (!dev)
6269                 return NULL;
6270
6271         priv = netdev_priv(dev);
6272         priv->rx_copybreak = QETH_RX_COPYBREAK;
6273         priv->tx_wanted_queues = IS_IQD(card) ? QETH_IQD_MIN_TXQ : 1;
6274
6275         dev->ml_priv = card;
6276         dev->watchdog_timeo = QETH_TX_TIMEOUT;
6277         dev->min_mtu = IS_OSN(card) ? 64 : 576;
6278          /* initialized when device first goes online: */
6279         dev->max_mtu = 0;
6280         dev->mtu = 0;
6281         SET_NETDEV_DEV(dev, &card->gdev->dev);
6282         netif_carrier_off(dev);
6283
6284         if (IS_OSN(card)) {
6285                 dev->ethtool_ops = &qeth_osn_ethtool_ops;
6286         } else {
6287                 dev->ethtool_ops = &qeth_ethtool_ops;
6288                 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
6289                 dev->hw_features |= NETIF_F_SG;
6290                 dev->vlan_features |= NETIF_F_SG;
6291                 if (IS_IQD(card))
6292                         dev->features |= NETIF_F_SG;
6293         }
6294
6295         return dev;
6296 }
6297
6298 struct net_device *qeth_clone_netdev(struct net_device *orig)
6299 {
6300         struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
6301
6302         if (!clone)
6303                 return NULL;
6304
6305         clone->dev_port = orig->dev_port;
6306         return clone;
6307 }
6308
6309 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
6310 {
6311         struct qeth_card *card;
6312         struct device *dev;
6313         int rc;
6314         enum qeth_discipline_id enforced_disc;
6315         char dbf_name[DBF_NAME_LEN];
6316
6317         QETH_DBF_TEXT(SETUP, 2, "probedev");
6318
6319         dev = &gdev->dev;
6320         if (!get_device(dev))
6321                 return -ENODEV;
6322
6323         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
6324
6325         card = qeth_alloc_card(gdev);
6326         if (!card) {
6327                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
6328                 rc = -ENOMEM;
6329                 goto err_dev;
6330         }
6331
6332         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
6333                 dev_name(&gdev->dev));
6334         card->debug = qeth_get_dbf_entry(dbf_name);
6335         if (!card->debug) {
6336                 rc = qeth_add_dbf_entry(card, dbf_name);
6337                 if (rc)
6338                         goto err_card;
6339         }
6340
6341         qeth_setup_card(card);
6342         card->dev = qeth_alloc_netdev(card);
6343         if (!card->dev) {
6344                 rc = -ENOMEM;
6345                 goto err_card;
6346         }
6347
6348         qeth_determine_capabilities(card);
6349         qeth_set_blkt_defaults(card);
6350
6351         card->qdio.no_out_queues = card->dev->num_tx_queues;
6352         rc = qeth_update_from_chp_desc(card);
6353         if (rc)
6354                 goto err_chp_desc;
6355
6356         enforced_disc = qeth_enforce_discipline(card);
6357         switch (enforced_disc) {
6358         case QETH_DISCIPLINE_UNDETERMINED:
6359                 gdev->dev.type = &qeth_generic_devtype;
6360                 break;
6361         default:
6362                 card->info.layer_enforced = true;
6363                 rc = qeth_core_load_discipline(card, enforced_disc);
6364                 if (rc)
6365                         goto err_load;
6366
6367                 gdev->dev.type = IS_OSN(card) ? &qeth_osn_devtype :
6368                                                 card->discipline->devtype;
6369                 rc = card->discipline->setup(card->gdev);
6370                 if (rc)
6371                         goto err_disc;
6372                 break;
6373         }
6374
6375         return 0;
6376
6377 err_disc:
6378         qeth_core_free_discipline(card);
6379 err_load:
6380 err_chp_desc:
6381         free_netdev(card->dev);
6382 err_card:
6383         qeth_core_free_card(card);
6384 err_dev:
6385         put_device(dev);
6386         return rc;
6387 }
6388
6389 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
6390 {
6391         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6392
6393         QETH_CARD_TEXT(card, 2, "removedv");
6394
6395         if (card->discipline) {
6396                 card->discipline->remove(gdev);
6397                 qeth_core_free_discipline(card);
6398         }
6399
6400         qeth_free_qdio_queues(card);
6401
6402         free_netdev(card->dev);
6403         qeth_core_free_card(card);
6404         put_device(&gdev->dev);
6405 }
6406
6407 static int qeth_core_set_online(struct ccwgroup_device *gdev)
6408 {
6409         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6410         int rc = 0;
6411         enum qeth_discipline_id def_discipline;
6412
6413         if (!card->discipline) {
6414                 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
6415                                                 QETH_DISCIPLINE_LAYER2;
6416                 rc = qeth_core_load_discipline(card, def_discipline);
6417                 if (rc)
6418                         goto err;
6419                 rc = card->discipline->setup(card->gdev);
6420                 if (rc) {
6421                         qeth_core_free_discipline(card);
6422                         goto err;
6423                 }
6424         }
6425
6426         rc = qeth_set_online(card);
6427 err:
6428         return rc;
6429 }
6430
6431 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
6432 {
6433         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6434
6435         return qeth_set_offline(card, false);
6436 }
6437
6438 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
6439 {
6440         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6441
6442         qeth_set_allowed_threads(card, 0, 1);
6443         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
6444                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
6445         qeth_qdio_clear_card(card, 0);
6446         qeth_drain_output_queues(card);
6447         qdio_free(CARD_DDEV(card));
6448 }
6449
6450 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
6451                            size_t count)
6452 {
6453         int err;
6454
6455         err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
6456                                   buf);
6457
6458         return err ? err : count;
6459 }
6460 static DRIVER_ATTR_WO(group);
6461
6462 static struct attribute *qeth_drv_attrs[] = {
6463         &driver_attr_group.attr,
6464         NULL,
6465 };
6466 static struct attribute_group qeth_drv_attr_group = {
6467         .attrs = qeth_drv_attrs,
6468 };
6469 static const struct attribute_group *qeth_drv_attr_groups[] = {
6470         &qeth_drv_attr_group,
6471         NULL,
6472 };
6473
6474 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
6475         .driver = {
6476                 .groups = qeth_drv_attr_groups,
6477                 .owner = THIS_MODULE,
6478                 .name = "qeth",
6479         },
6480         .ccw_driver = &qeth_ccw_driver,
6481         .setup = qeth_core_probe_device,
6482         .remove = qeth_core_remove_device,
6483         .set_online = qeth_core_set_online,
6484         .set_offline = qeth_core_set_offline,
6485         .shutdown = qeth_core_shutdown,
6486 };
6487
6488 struct qeth_card *qeth_get_card_by_busid(char *bus_id)
6489 {
6490         struct ccwgroup_device *gdev;
6491         struct qeth_card *card;
6492
6493         gdev = get_ccwgroupdev_by_busid(&qeth_core_ccwgroup_driver, bus_id);
6494         if (!gdev)
6495                 return NULL;
6496
6497         card = dev_get_drvdata(&gdev->dev);
6498         put_device(&gdev->dev);
6499         return card;
6500 }
6501 EXPORT_SYMBOL_GPL(qeth_get_card_by_busid);
6502
6503 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
6504 {
6505         struct qeth_card *card = dev->ml_priv;
6506         struct mii_ioctl_data *mii_data;
6507         int rc = 0;
6508
6509         switch (cmd) {
6510         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
6511                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
6512                 break;
6513         case SIOC_QETH_GET_CARD_TYPE:
6514                 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
6515                     !IS_VM_NIC(card))
6516                         return 1;
6517                 return 0;
6518         case SIOCGMIIPHY:
6519                 mii_data = if_mii(rq);
6520                 mii_data->phy_id = 0;
6521                 break;
6522         case SIOCGMIIREG:
6523                 mii_data = if_mii(rq);
6524                 if (mii_data->phy_id != 0)
6525                         rc = -EINVAL;
6526                 else
6527                         mii_data->val_out = qeth_mdio_read(dev,
6528                                 mii_data->phy_id, mii_data->reg_num);
6529                 break;
6530         case SIOC_QETH_QUERY_OAT:
6531                 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
6532                 break;
6533         default:
6534                 if (card->discipline->do_ioctl)
6535                         rc = card->discipline->do_ioctl(dev, rq, cmd);
6536                 else
6537                         rc = -EOPNOTSUPP;
6538         }
6539         if (rc)
6540                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6541         return rc;
6542 }
6543 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
6544
6545 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
6546                               unsigned long data)
6547 {
6548         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6549         u32 *features = reply->param;
6550
6551         if (qeth_setassparms_inspect_rc(cmd))
6552                 return -EIO;
6553
6554         *features = cmd->data.setassparms.data.flags_32bit;
6555         return 0;
6556 }
6557
6558 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6559                              enum qeth_prot_versions prot)
6560 {
6561         return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
6562                                                  NULL, prot);
6563 }
6564
6565 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6566                             enum qeth_prot_versions prot, u8 *lp2lp)
6567 {
6568         u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
6569         struct qeth_cmd_buffer *iob;
6570         struct qeth_ipa_caps caps;
6571         u32 features;
6572         int rc;
6573
6574         /* some L3 HW requires combined L3+L4 csum offload: */
6575         if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
6576             cstype == IPA_OUTBOUND_CHECKSUM)
6577                 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
6578
6579         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6580                                        prot);
6581         if (!iob)
6582                 return -ENOMEM;
6583
6584         rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
6585         if (rc)
6586                 return rc;
6587
6588         if ((required_features & features) != required_features) {
6589                 qeth_set_csum_off(card, cstype, prot);
6590                 return -EOPNOTSUPP;
6591         }
6592
6593         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6594                                        SETASS_DATA_SIZEOF(flags_32bit),
6595                                        prot);
6596         if (!iob) {
6597                 qeth_set_csum_off(card, cstype, prot);
6598                 return -ENOMEM;
6599         }
6600
6601         if (features & QETH_IPA_CHECKSUM_LP2LP)
6602                 required_features |= QETH_IPA_CHECKSUM_LP2LP;
6603         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
6604         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6605         if (rc) {
6606                 qeth_set_csum_off(card, cstype, prot);
6607                 return rc;
6608         }
6609
6610         if (!qeth_ipa_caps_supported(&caps, required_features) ||
6611             !qeth_ipa_caps_enabled(&caps, required_features)) {
6612                 qeth_set_csum_off(card, cstype, prot);
6613                 return -EOPNOTSUPP;
6614         }
6615
6616         dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6617                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6618
6619         if (lp2lp)
6620                 *lp2lp = qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP);
6621
6622         return 0;
6623 }
6624
6625 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6626                              enum qeth_prot_versions prot, u8 *lp2lp)
6627 {
6628         return on ? qeth_set_csum_on(card, cstype, prot, lp2lp) :
6629                     qeth_set_csum_off(card, cstype, prot);
6630 }
6631
6632 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
6633                              unsigned long data)
6634 {
6635         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6636         struct qeth_tso_start_data *tso_data = reply->param;
6637
6638         if (qeth_setassparms_inspect_rc(cmd))
6639                 return -EIO;
6640
6641         tso_data->mss = cmd->data.setassparms.data.tso.mss;
6642         tso_data->supported = cmd->data.setassparms.data.tso.supported;
6643         return 0;
6644 }
6645
6646 static int qeth_set_tso_off(struct qeth_card *card,
6647                             enum qeth_prot_versions prot)
6648 {
6649         return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
6650                                                  IPA_CMD_ASS_STOP, NULL, prot);
6651 }
6652
6653 static int qeth_set_tso_on(struct qeth_card *card,
6654                            enum qeth_prot_versions prot)
6655 {
6656         struct qeth_tso_start_data tso_data;
6657         struct qeth_cmd_buffer *iob;
6658         struct qeth_ipa_caps caps;
6659         int rc;
6660
6661         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6662                                        IPA_CMD_ASS_START, 0, prot);
6663         if (!iob)
6664                 return -ENOMEM;
6665
6666         rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6667         if (rc)
6668                 return rc;
6669
6670         if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6671                 qeth_set_tso_off(card, prot);
6672                 return -EOPNOTSUPP;
6673         }
6674
6675         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6676                                        IPA_CMD_ASS_ENABLE,
6677                                        SETASS_DATA_SIZEOF(caps), prot);
6678         if (!iob) {
6679                 qeth_set_tso_off(card, prot);
6680                 return -ENOMEM;
6681         }
6682
6683         /* enable TSO capability */
6684         __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6685                 QETH_IPA_LARGE_SEND_TCP;
6686         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6687         if (rc) {
6688                 qeth_set_tso_off(card, prot);
6689                 return rc;
6690         }
6691
6692         if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6693             !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6694                 qeth_set_tso_off(card, prot);
6695                 return -EOPNOTSUPP;
6696         }
6697
6698         dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6699                  tso_data.mss);
6700         return 0;
6701 }
6702
6703 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6704                             enum qeth_prot_versions prot)
6705 {
6706         return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6707 }
6708
6709 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6710 {
6711         int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6712         int rc_ipv6;
6713
6714         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6715                 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6716                                             QETH_PROT_IPV4, NULL);
6717         if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6718                 /* no/one Offload Assist available, so the rc is trivial */
6719                 return rc_ipv4;
6720
6721         rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6722                                     QETH_PROT_IPV6, NULL);
6723
6724         if (on)
6725                 /* enable: success if any Assist is active */
6726                 return (rc_ipv6) ? rc_ipv4 : 0;
6727
6728         /* disable: failure if any Assist is still active */
6729         return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6730 }
6731
6732 /**
6733  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6734  * @dev:        a net_device
6735  */
6736 void qeth_enable_hw_features(struct net_device *dev)
6737 {
6738         struct qeth_card *card = dev->ml_priv;
6739         netdev_features_t features;
6740
6741         features = dev->features;
6742         /* force-off any feature that might need an IPA sequence.
6743          * netdev_update_features() will restart them.
6744          */
6745         dev->features &= ~dev->hw_features;
6746         /* toggle VLAN filter, so that VIDs are re-programmed: */
6747         if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6748                 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6749                 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6750         }
6751         netdev_update_features(dev);
6752         if (features != dev->features)
6753                 dev_warn(&card->gdev->dev,
6754                          "Device recovery failed to restore all offload features\n");
6755 }
6756 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6757
6758 static void qeth_check_restricted_features(struct qeth_card *card,
6759                                            netdev_features_t changed,
6760                                            netdev_features_t actual)
6761 {
6762         netdev_features_t ipv6_features = NETIF_F_TSO6;
6763         netdev_features_t ipv4_features = NETIF_F_TSO;
6764
6765         if (!card->info.has_lp2lp_cso_v6)
6766                 ipv6_features |= NETIF_F_IPV6_CSUM;
6767         if (!card->info.has_lp2lp_cso_v4)
6768                 ipv4_features |= NETIF_F_IP_CSUM;
6769
6770         if ((changed & ipv6_features) && !(actual & ipv6_features))
6771                 qeth_flush_local_addrs6(card);
6772         if ((changed & ipv4_features) && !(actual & ipv4_features))
6773                 qeth_flush_local_addrs4(card);
6774 }
6775
6776 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6777 {
6778         struct qeth_card *card = dev->ml_priv;
6779         netdev_features_t changed = dev->features ^ features;
6780         int rc = 0;
6781
6782         QETH_CARD_TEXT(card, 2, "setfeat");
6783         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6784
6785         if ((changed & NETIF_F_IP_CSUM)) {
6786                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6787                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4,
6788                                        &card->info.has_lp2lp_cso_v4);
6789                 if (rc)
6790                         changed ^= NETIF_F_IP_CSUM;
6791         }
6792         if (changed & NETIF_F_IPV6_CSUM) {
6793                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6794                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6,
6795                                        &card->info.has_lp2lp_cso_v6);
6796                 if (rc)
6797                         changed ^= NETIF_F_IPV6_CSUM;
6798         }
6799         if (changed & NETIF_F_RXCSUM) {
6800                 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6801                 if (rc)
6802                         changed ^= NETIF_F_RXCSUM;
6803         }
6804         if (changed & NETIF_F_TSO) {
6805                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
6806                                       QETH_PROT_IPV4);
6807                 if (rc)
6808                         changed ^= NETIF_F_TSO;
6809         }
6810         if (changed & NETIF_F_TSO6) {
6811                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
6812                                       QETH_PROT_IPV6);
6813                 if (rc)
6814                         changed ^= NETIF_F_TSO6;
6815         }
6816
6817         qeth_check_restricted_features(card, dev->features ^ features,
6818                                        dev->features ^ changed);
6819
6820         /* everything changed successfully? */
6821         if ((dev->features ^ features) == changed)
6822                 return 0;
6823         /* something went wrong. save changed features and return error */
6824         dev->features ^= changed;
6825         return -EIO;
6826 }
6827 EXPORT_SYMBOL_GPL(qeth_set_features);
6828
6829 netdev_features_t qeth_fix_features(struct net_device *dev,
6830                                     netdev_features_t features)
6831 {
6832         struct qeth_card *card = dev->ml_priv;
6833
6834         QETH_CARD_TEXT(card, 2, "fixfeat");
6835         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6836                 features &= ~NETIF_F_IP_CSUM;
6837         if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6838                 features &= ~NETIF_F_IPV6_CSUM;
6839         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6840             !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6841                 features &= ~NETIF_F_RXCSUM;
6842         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6843                 features &= ~NETIF_F_TSO;
6844         if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
6845                 features &= ~NETIF_F_TSO6;
6846
6847         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6848         return features;
6849 }
6850 EXPORT_SYMBOL_GPL(qeth_fix_features);
6851
6852 netdev_features_t qeth_features_check(struct sk_buff *skb,
6853                                       struct net_device *dev,
6854                                       netdev_features_t features)
6855 {
6856         struct qeth_card *card = dev->ml_priv;
6857
6858         /* Traffic with local next-hop is not eligible for some offloads: */
6859         if (skb->ip_summed == CHECKSUM_PARTIAL &&
6860             READ_ONCE(card->options.isolation) != ISOLATION_MODE_FWD) {
6861                 netdev_features_t restricted = 0;
6862
6863                 if (skb_is_gso(skb) && !netif_needs_gso(skb, features))
6864                         restricted |= NETIF_F_ALL_TSO;
6865
6866                 switch (vlan_get_protocol(skb)) {
6867                 case htons(ETH_P_IP):
6868                         if (!card->info.has_lp2lp_cso_v4)
6869                                 restricted |= NETIF_F_IP_CSUM;
6870
6871                         if (restricted && qeth_next_hop_is_local_v4(card, skb))
6872                                 features &= ~restricted;
6873                         break;
6874                 case htons(ETH_P_IPV6):
6875                         if (!card->info.has_lp2lp_cso_v6)
6876                                 restricted |= NETIF_F_IPV6_CSUM;
6877
6878                         if (restricted && qeth_next_hop_is_local_v6(card, skb))
6879                                 features &= ~restricted;
6880                         break;
6881                 default:
6882                         break;
6883                 }
6884         }
6885
6886         /* GSO segmentation builds skbs with
6887          *      a (small) linear part for the headers, and
6888          *      page frags for the data.
6889          * Compared to a linear skb, the header-only part consumes an
6890          * additional buffer element. This reduces buffer utilization, and
6891          * hurts throughput. So compress small segments into one element.
6892          */
6893         if (netif_needs_gso(skb, features)) {
6894                 /* match skb_segment(): */
6895                 unsigned int doffset = skb->data - skb_mac_header(skb);
6896                 unsigned int hsize = skb_shinfo(skb)->gso_size;
6897                 unsigned int hroom = skb_headroom(skb);
6898
6899                 /* linearize only if resulting skb allocations are order-0: */
6900                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6901                         features &= ~NETIF_F_SG;
6902         }
6903
6904         return vlan_features_check(skb, features);
6905 }
6906 EXPORT_SYMBOL_GPL(qeth_features_check);
6907
6908 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
6909 {
6910         struct qeth_card *card = dev->ml_priv;
6911         struct qeth_qdio_out_q *queue;
6912         unsigned int i;
6913
6914         QETH_CARD_TEXT(card, 5, "getstat");
6915
6916         stats->rx_packets = card->stats.rx_packets;
6917         stats->rx_bytes = card->stats.rx_bytes;
6918         stats->rx_errors = card->stats.rx_length_errors +
6919                            card->stats.rx_frame_errors +
6920                            card->stats.rx_fifo_errors;
6921         stats->rx_dropped = card->stats.rx_dropped_nomem +
6922                             card->stats.rx_dropped_notsupp +
6923                             card->stats.rx_dropped_runt;
6924         stats->multicast = card->stats.rx_multicast;
6925         stats->rx_length_errors = card->stats.rx_length_errors;
6926         stats->rx_frame_errors = card->stats.rx_frame_errors;
6927         stats->rx_fifo_errors = card->stats.rx_fifo_errors;
6928
6929         for (i = 0; i < card->qdio.no_out_queues; i++) {
6930                 queue = card->qdio.out_qs[i];
6931
6932                 stats->tx_packets += queue->stats.tx_packets;
6933                 stats->tx_bytes += queue->stats.tx_bytes;
6934                 stats->tx_errors += queue->stats.tx_errors;
6935                 stats->tx_dropped += queue->stats.tx_dropped;
6936         }
6937 }
6938 EXPORT_SYMBOL_GPL(qeth_get_stats64);
6939
6940 #define TC_IQD_UCAST   0
6941 static void qeth_iqd_set_prio_tc_map(struct net_device *dev,
6942                                      unsigned int ucast_txqs)
6943 {
6944         unsigned int prio;
6945
6946         /* IQD requires mcast traffic to be placed on a dedicated queue, and
6947          * qeth_iqd_select_queue() deals with this.
6948          * For unicast traffic, we defer the queue selection to the stack.
6949          * By installing a trivial prio map that spans over only the unicast
6950          * queues, we can encourage the stack to spread the ucast traffic evenly
6951          * without selecting the mcast queue.
6952          */
6953
6954         /* One traffic class, spanning over all active ucast queues: */
6955         netdev_set_num_tc(dev, 1);
6956         netdev_set_tc_queue(dev, TC_IQD_UCAST, ucast_txqs,
6957                             QETH_IQD_MIN_UCAST_TXQ);
6958
6959         /* Map all priorities to this traffic class: */
6960         for (prio = 0; prio <= TC_BITMASK; prio++)
6961                 netdev_set_prio_tc_map(dev, prio, TC_IQD_UCAST);
6962 }
6963
6964 int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count)
6965 {
6966         struct net_device *dev = card->dev;
6967         int rc;
6968
6969         /* Per netif_setup_tc(), adjust the mapping first: */
6970         if (IS_IQD(card))
6971                 qeth_iqd_set_prio_tc_map(dev, count - 1);
6972
6973         rc = netif_set_real_num_tx_queues(dev, count);
6974
6975         if (rc && IS_IQD(card))
6976                 qeth_iqd_set_prio_tc_map(dev, dev->real_num_tx_queues - 1);
6977
6978         return rc;
6979 }
6980 EXPORT_SYMBOL_GPL(qeth_set_real_num_tx_queues);
6981
6982 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
6983                           u8 cast_type, struct net_device *sb_dev)
6984 {
6985         u16 txq;
6986
6987         if (cast_type != RTN_UNICAST)
6988                 return QETH_IQD_MCAST_TXQ;
6989         if (dev->real_num_tx_queues == QETH_IQD_MIN_TXQ)
6990                 return QETH_IQD_MIN_UCAST_TXQ;
6991
6992         txq = netdev_pick_tx(dev, skb, sb_dev);
6993         return (txq == QETH_IQD_MCAST_TXQ) ? QETH_IQD_MIN_UCAST_TXQ : txq;
6994 }
6995 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
6996
6997 int qeth_open(struct net_device *dev)
6998 {
6999         struct qeth_card *card = dev->ml_priv;
7000
7001         QETH_CARD_TEXT(card, 4, "qethopen");
7002
7003         card->data.state = CH_STATE_UP;
7004         netif_tx_start_all_queues(dev);
7005
7006         napi_enable(&card->napi);
7007         local_bh_disable();
7008         napi_schedule(&card->napi);
7009         if (IS_IQD(card)) {
7010                 struct qeth_qdio_out_q *queue;
7011                 unsigned int i;
7012
7013                 qeth_for_each_output_queue(card, queue, i) {
7014                         netif_tx_napi_add(dev, &queue->napi, qeth_tx_poll,
7015                                           QETH_NAPI_WEIGHT);
7016                         napi_enable(&queue->napi);
7017                         napi_schedule(&queue->napi);
7018                 }
7019         }
7020         /* kick-start the NAPI softirq: */
7021         local_bh_enable();
7022         return 0;
7023 }
7024 EXPORT_SYMBOL_GPL(qeth_open);
7025
7026 int qeth_stop(struct net_device *dev)
7027 {
7028         struct qeth_card *card = dev->ml_priv;
7029
7030         QETH_CARD_TEXT(card, 4, "qethstop");
7031         if (IS_IQD(card)) {
7032                 struct qeth_qdio_out_q *queue;
7033                 unsigned int i;
7034
7035                 /* Quiesce the NAPI instances: */
7036                 qeth_for_each_output_queue(card, queue, i)
7037                         napi_disable(&queue->napi);
7038
7039                 /* Stop .ndo_start_xmit, might still access queue->napi. */
7040                 netif_tx_disable(dev);
7041
7042                 qeth_for_each_output_queue(card, queue, i) {
7043                         del_timer_sync(&queue->timer);
7044                         /* Queues may get re-allocated, so remove the NAPIs. */
7045                         netif_napi_del(&queue->napi);
7046                 }
7047         } else {
7048                 netif_tx_disable(dev);
7049         }
7050
7051         napi_disable(&card->napi);
7052         cancel_delayed_work_sync(&card->buffer_reclaim_work);
7053         qdio_stop_irq(CARD_DDEV(card));
7054
7055         return 0;
7056 }
7057 EXPORT_SYMBOL_GPL(qeth_stop);
7058
7059 static int __init qeth_core_init(void)
7060 {
7061         int rc;
7062
7063         pr_info("loading core functions\n");
7064
7065         qeth_debugfs_root = debugfs_create_dir("qeth", NULL);
7066
7067         rc = qeth_register_dbf_views();
7068         if (rc)
7069                 goto dbf_err;
7070         qeth_core_root_dev = root_device_register("qeth");
7071         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
7072         if (rc)
7073                 goto register_err;
7074         qeth_core_header_cache =
7075                 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
7076                                   roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
7077                                   0, NULL);
7078         if (!qeth_core_header_cache) {
7079                 rc = -ENOMEM;
7080                 goto slab_err;
7081         }
7082         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
7083                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
7084         if (!qeth_qdio_outbuf_cache) {
7085                 rc = -ENOMEM;
7086                 goto cqslab_err;
7087         }
7088         rc = ccw_driver_register(&qeth_ccw_driver);
7089         if (rc)
7090                 goto ccw_err;
7091         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
7092         if (rc)
7093                 goto ccwgroup_err;
7094
7095         return 0;
7096
7097 ccwgroup_err:
7098         ccw_driver_unregister(&qeth_ccw_driver);
7099 ccw_err:
7100         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7101 cqslab_err:
7102         kmem_cache_destroy(qeth_core_header_cache);
7103 slab_err:
7104         root_device_unregister(qeth_core_root_dev);
7105 register_err:
7106         qeth_unregister_dbf_views();
7107 dbf_err:
7108         debugfs_remove_recursive(qeth_debugfs_root);
7109         pr_err("Initializing the qeth device driver failed\n");
7110         return rc;
7111 }
7112
7113 static void __exit qeth_core_exit(void)
7114 {
7115         qeth_clear_dbf_list();
7116         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
7117         ccw_driver_unregister(&qeth_ccw_driver);
7118         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7119         kmem_cache_destroy(qeth_core_header_cache);
7120         root_device_unregister(qeth_core_root_dev);
7121         qeth_unregister_dbf_views();
7122         debugfs_remove_recursive(qeth_debugfs_root);
7123         pr_info("core functions removed\n");
7124 }
7125
7126 module_init(qeth_core_init);
7127 module_exit(qeth_core_exit);
7128 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
7129 MODULE_DESCRIPTION("qeth core functions");
7130 MODULE_LICENSE("GPL");